So, I'm a doc who dives. Lungs are composed of little sacs with very thin walls called alveoli. These WILL burst with small elevations in depth causing air to collect in the space surrounding the lungs. We call the resulting little pockets of air in this space under the skin crepitus. They feel and look like little rice crispies that will collect around the base of the neck. It is NOT good to burst the little alveoli in your lungs. It should be avoided. Don't hold your breath going up. I'd go with Woody's suggestion of hold the snorkeler at depth with your reg and use your backup and bring them slowly to the surface while breathing.
The irony is that there has been so many of these pulmonary barotraumas from breath-hold diving-induced lung injury that it has its own medical and diving-related terms and there is significant instruction required about it in PADI and other accredited and respected diving instruction...and one must assume that Gus would have taught about it as a Dive Instructor.
I hate to muddy the waters here, but I think this would be an issue of lung volumes. If a diver at 33ft takes a breath to the vital lung capacity, say 6L, and holds while rising, sure you'll blow out the alveoli. But if you exhale to say half, at 3L the peak of tidal volume, that and rise while holding, that would expand to 6L at surface, and you'd let out a full breath. and if you exhale to the tidal volume to 2.5L or down to the expiratory reserve volume at say 1250ml and rise you'd probably hurt over those 33-66 seconds but more like a hypoxia hurt not a barotrauma hurt. But this doesn't take into account lung compliance and what is happening at the tissue level... just the pressures. One thing I don't understand from the physiology explanations in my dive class, and what Gus and Woody say, is that the lungs are compressed. The lungs are in the chest cavity, and I don't think the chest gets compressed much if at all. The wet suit compresses, so maybe the tissues and structures compress marginally. But from a dimension/measurement perspective the pleural volume (the volume of the chest cavity that holds the lungs) can't change much, otherwise we'd feel intesnse pressure on the chest when we dive. All that to say, I'm not testing my theory on my set of lungs (and neither should anyone else). And i wouldnt' share with the snorkler - you can't "hold him at depth' cause how could you guarantee he won't bolt? do no harm.
That is called subcutaneous emphysema, not crepitus. It is an indicator of a lung overexpansion injury like pneumothorax. Crepitus is the crackling, unstable sensation indicative of a bone fracture or joint injury. Some describe the crackling feeling of subconscious emphysema as similar to crepitus.
"In my opinion, we're breathing in that bioluminescence and that's where I get the so special powers that I talk about." "Okay, this just went south." 😂😂😂
NASDS used to require a "harassment day" in the pool before graduating anyone. The instructors and aids would harass the students, pulling off masks, borrowing and keeping regulators, shutting tank valves, and if you surfaced you flunked. The rest of the industry all said that could cause a death. NASDS said it was better to panic in a pool with lifeguards, than to panic and die in open water.
Woody is 100% in the right on the final lung injury segment! Gus's one argument was regarding ascending on a rebreather and how it blows up the cheeks, but that's not the same as holding air in the lungs. It's possible to do damage to your lungs simply by taking a deep breath and trying to force it out with the diaphragm while holding it back at the larynx. People have damaged their lungs in a similar way by trying to hold back sneezes. It's undeniably possible to damage your lungs on a fast ascent before the air is forced out of the, absolutely!
I can almost assure you that Woody is the type of person to end up surfacing to the wrong boat on a night dive, and would probably still have the same amount of fun and make new friends, as if he was in the CORRECT boat 🤣🤷
Back in the 1990s, while on a beach dive (Wood's Cove, Laguna, CA), an octopus, jetted out and wrapped itself around my dive buddy's forearm. Don't know if it was being extra friendly, or was a bit over ambitious about its next intended meal. Diving is always an adventure.
Definetely team Woody on hyperexpansion injury. Cheeks being filled with air when ascending on a rebreather only shows that our respiratory muscles are not strong enough (or lack mobility) to hyperinflate the lungs on themselves, but you are NOT locking the air passage in anyway in this case. When one holds their breath, there is also locking of air passage in the throat (like closing a valve or making a knot on a filled ballon). The whole idea of letting very small bubbles of is to help divers keep their throat muscles not engaged. Also, neither a diver nor their lungs would pop like a balloon. Instead, some alveoli in their lungs would pop like micro-balloons. This would relieve pressure, so this lesion would probably only affect some parts of the lungs, but the gas release inside the thoracic cavity would very likely lead to embolism, etc.
I don't know how you're holding your breath, but I'm not locking my throat up when I hold mine! Yes, I can do it but usually when I hold my breath (free diving etc) I just breathe in close my mouth and stop breathing, why would you lock your throat out by squeezing your neck muscles?
@@computerbob06 not sure about the technique you are using, but tipically the muscles in your upper respiratory system will engage to prevent the air from escaping your lungs. This is much more effective than keeping your diaphragm, which is a larger muscle, contracted. The muscles involved in locking the airways are very complex and many people do not realize they are making use of them, but it helps if they pay close attention to the muscles that are activated to block the airways when they are swallowing (so things you ingest do not go to the lungs). If you are able to open your mouth and still not breath water in or air out, it is probable that you are locking your throat. Also, the airways being shut is what keeps freedivers from breathing in water when they experience diaphragm involuntary contractions and spasms. But if one person where to hold their breath while using inspiratory muscles only (holding the mouth shut is not possible with a regulator in it), then it would be ok, yes.
@@computerbob06you say free diving, but are you actually free diving to depth? Equalizing past 15 or 20 m requires the Frenzel technique which requires actively closing the glottis (“throat” muscles)
@@computerbob06 you may not think you are "locking your throat", but you are. Simply closing your mouth doesnt prevent breathing which is an involuntary process that must be actively fought against.
I love that you encourage folks to buy local. This is very important because your local shop needs to be supported to keep its doors open. It very important because it’s a pain to have to go a long distance to get service on your equipment or tank fills.
Lake Hickory SCUBA did a video of a kid at Vortex springs who free dove into an air bell, and then returned to the surface. Definitely had a lung overexpansion injury!!
I think I understand why Gus is saying that, but I think he misunderstood the lung over expansion injury as the lung actually blows up. I think that's maybe because of the teaching part of this over simplified it. The long over expansion can happen where the micro tissue transfer air into our cell. Your mouse cannot hold the air till the long explode, because the long tissue as a hoe is very strong, but the micro tissue that does the breathing is not very strong, so if those micro tissue got damaged and lose the function of transfer air into our blood and the person will suffocate.
I will disagree with Gus here. 30 year medic (now retired), and it IS possible to have micro ruptures on an alveolar level doing what you describe. One can do it by coughing if it gets bad enough, especially if you are trying to bring up "stuff" by partially holding and coughing to create more outward velocity of air. In fact, many COPD patients get blebs for that very reason. Blebs are groups of ruptured alveoli. It is damage and it is (possibly?) permanent.
As a doctor, I have to admit that Gus is wrong about the lung damage. The truth is that you wouldn't be able to hold air with your cheeks and mouth alone. Please note that the cheek and mouth area is quite large, so strong muscles are needed to hold the air in - force is pressure x area. That's why you feel like you can't hold air while using the reb mouthpeace. However, the problem concerns the throat and larynx. You can easily close the airway passage passively. It's not a perfect comparison, but try tucking your chin toward your chest and inhaling through your mouth - you'll notice that your tongue will block the airflow. Now, if you move your head back, you will immediately open the passage through the throat. Secondly, the passage area of the larynx is relatively small, so the vocal muscles can easily block the airflow. The same applies to the epiglottis - it can easily block the flow of air through the larynx. Therefore, during resuscitation, we tilt the person's head back to open the airway.
To me you guys are the face of diving, I’m currently halfway through my open water course because of you guys, and I thank you so much. I absolutely love it, and your videos make me want to dive much more every single day. Thankyou Gus and Woody for being awesome guys!
Never hold your breath while diving. It is absolutely true that someone can injure their lungs before it forces the air out. Also, I think on a CCR we use OPV ( over pressure value ) to solve the expending gas while ascending.
I got certified in 1975. Back then they showed some very explicitly gruesome movies (on 16mm film, no video). This was the time when they showed Red Asphalt, in Driver's Ed class, and there was a police trade magazine, showing very explicit accident photos. So in the same vein, in scuba class, we saw a couple of scuba accident movies showing lung expansion injuries. Usually fatal. That scared me to Woody's side, almost 50 years ago !
I can`t thank you enough - you`re my favourite talk duo on youtube 🤩! Thank you for bringing up this important topic of other divers giving advice and your view on it! P.S.: Just went diving on the Seychelles and was thinking of your dive talk. Catching up with the last few videos now 😀!
Gus isn’t taking into consideration the weakness of lung tissues. They’re very fragile. You don’t need to ‘pop’ the lungs like a balloon. Just a tiny, maybe not even visible tear can let gas into the pulmonary circulation, and produce an AGE.
Love this channel! Educational and entertaining. Thanks for the amazing content! I’ll be taking my first ever dive course here in a few weeks, and this is very helpful
Interesting discussion regarding the inability to blow your lungs up. I think cadaver experiment could solve this question. I would imagine that the aveoli which are one cell thick would pop first. That's my hypothesis. Great content, thank you!
I'm Team Woody with the breath-holding snorkeller. The snorkeller would get Barotrauma for sure in the scenario described. I would hold them tight and use my spare reg. Like Woody suggested.
Everyone should watch to the end of the video😂 I enjoy a good debate on Divetalk videos. I watch the one about the heart stabbing whenever I need a good mood boost.
As a newbie in diving I'm Team Woody on the NEVER HOLD YOUR BREATH part (sorry Gus!😂) Being a newly certified open water diver myself, sometimes I don't always notice that I'm ascending right away when i'm diving in the open water, esp. when the visibility isn't that great or when i'm distracted by marine life, so remembering to not hold my breath is the safer thing to do. Call me overly cautious but it's just not worth the risk imo🤷♀ PS: I'm a relatively new subscriber and as a beginner diver I absolutely enjoy watching your videos and have learned so much from you guys. Thanks for the amazing content, Gus & Woody! Love you guys🥰
Instead of a large carabiner I use a double-ender and a bungee loop to hold my fins (and mask generally is in the pocket of the fin). The double ender I can use for something else on the dive as well (if needed) as well as the bungee (it saved/helper me once with a broken piece of bungee which holds my inflator hose). Generally I clip it away at my butt d-ring (I dive sidemount) or place it in my pouch. Feels a lot easier then a massive carabiner which can also clip easily (sort of) open onto a line...
I got my first BCD and regulator used from a trusted local dive school. They would buy new gear every year for classes and would often have stuff for sale when you asked the shop owner. With the local dive shop I knew the stuff was religiously serviced, even if it was second hand and the guy always purchased really nice stuff for his own school. Once the dive shop knows you are a good returning customer, chances are you will be first to be tipped off about nice nearly new gear whenever they find any.
I use to put chap stick on my mustache to help it seal and somehow on a dive one time it smeared all on the inside of the lens and I couldn't see shit for an hour long dive. Apparently we were surrounded by loggerheads on the dive and it ended up my worst dive ever hahaha.
Taping on the tank with a knife has been around for decades. I learned it when I was certified in 96' and my dad was a diver too, and he learned it in the 70's. Back then verry few people carried metal snaps diving. Back in the 70's it was also common to use a abalone iron to tap the tank.
I believe the mechanism for breath holding is called laryngeal valving and this valve closure in the throat is far stronger than the soft tissue of your outer lung lobes, meaning if you hold your breath and ascend on compressed air, your lungs will expand to their maximum point and the air can't escape through the laryngeal valve, so the expanding gas will find the weakest point, which will be your soft outer lung tissue. This is a fundamental concept in dive medicine and well documented through DAN. From DAN's article on Lung Expansion Injuries: Breath Holding during ascent forces gas into one of three locations: 1) the space within the chest cavity (pleural space), a condition known as pneumothorax; 2) the tissue planes within the lung itself (interstitial space), from where it may travel into the space around the heart, the tissues of the neck and the larynx (mediastinal emphysema); or 3) the blood. In this latter condition (arterial gas embolism, or AGE), gas bubbles can then pass from the pulmonary capillaries via the pulmonary veins to the left side of the heart and then to the carotid or basilar arteries (causing cerebral arterial gas embolism, or CAGE). See the link: dan.org/alert-diver/article/lung-expansion-injuries/ You said it Woody. People were gonna comment like crazy! Love your channel though. :)
Team AntiGus here. Even in OWD materials SSI says that your lungs can hold up to 0,12 Bar of extra pressure. So it means that you can have 1,2m of safe ascend on held breath. You are going to damage your lungs before you are unable to hold your breath no longer.
man.. i'm gutted you haven't included stuff from FlowState Divers.. those guys are really in the game of changing public perception of diving in general - in the best possible way
as a CCR diver I now (!) realise that Gus may have a point with the "chipmunk cheeks” on ascent. we are not really instructed to exhale on ascending (like on OC) because we can’t help but doing it ! it would be nice to have a scientific clarification on the matter of ascending head first, although I guess not many people would challenge the number one rule in scubadiving :) tks Gus for raising the point.
Woody, I do turn my light off on night dives, because if you hold still & turn off your light, and wait about 30 seconds, then when you turn it on again, you’ll have all kinds of marine life swimming around you! It’s an amazing experience! 😃
A 10 minute discussion on a short video simply highlights the high value of Dive Talk. It is entirely obvious you two have a high affinity for everything related to diving and that affinity drives you to educate people so they may share in the benefits with you. The outcome is everyone safer Everyone having more fun Everyone more able to support one another Woody is a damn treasure and Gus is the most awesome good friend, brother a free soul line Woody could hope for. You two are exemplary ambassadors to diving, inclusive. I love this show.
Woody is absolutely right about snorkelers. The difference here is that the snorkeler at 33ft wants to breathe due to high levels of CO2 while if he would breathe out of a regulator and rush up, he would need to exhale. Exhale dives are WAY more dangerous due to hypoxia.
I wonder if anyone uses silicone plumbers grease to get their mask to seal. We use it in plumbing because it’s non toxic and safe for potable water systems. I’ve gotten it on my skin daily for a very long time, and have never seen even the slightest adverse effects. I’m no diver, but the mask seal conversation got me thinking.
I try my best to buy local. I live in an area where 3-4 dive shops have closed up because people buy on line so much. I want dive shops around me. It make is so much easier for tank fills, equipment service and local diving charters.
Sharing air with a freediver already occurred with my daughter. Me and she are just starting our dive at 10m, and an instructor came of nowhere, and took her octopus, and started ascending. At the boat we understood the situation: a diver from other group passed out, and they need to leave immediately. The instructor tried to call us doing a freedive, because they think we are shallow and don’t want to take the time to prepare the gear. But as soon they found us, he needed air. So, I think, as long the “freediver” knows what he’s doing, as a diver, it’s fine to share air, and do a proper ascent.
According to the tip we reacted to, you basically almost murdered this person - who would've died for sure if you didn't give them air - but apparently they need to die of drowning, for their protection.
How have I only just realised you dropped a new video 9 hours ago. God dam I must be slacking thanks for the new video & I already know it's going to be 49 minutes of pure bliss. Its always Top notch content cheers gus & woody you're both Killing it ❤
I was just thinking guys, before my vision got so bad I was a quilter. I did a handpiecing in handcquilting, but I also quilted with my sewing machine. We always told beginners the same thing you tell new divers. Buy a good reliable brand of sewing machine from the shop that will service it. You not buy from the Internet, or a big box store, because neither one will service your machine, and that’s really important. Amazing, isn’t it? I bet you never thought there was a connection between diving and quilting. Right? Love you guys, Sandy from Cincinnati you were 80 year old fan.
Night Diving Tips: Compass usage is critical and only dive someplace at night where you have dove before during the day so you know what to expect Dive Gear: Only buy from your local dive shop. Support them because hopefully they have your back when you need them
#1.) Slow is good. The sensory deprivation requires a bit more reaction time, too. It isnt always possible if youre also drifting, like in Cozumel. Sometimes the current is taking you faster than youd like... #2) always know the captain's name and the name of the boat for the reasons you mentioned. Its really easy to get lost at night, especially if you ascend at a different place than was expected. Usually the captians in an area know each other and can radio your boat. #3)wear extra warmth, especially on your head. My last night dive, we had to wait on the surface for almost 20 mins for our boat. It was cool and windy and i wished i had a hood so bad! #4) I have that light. It's goood. Lasts a good long time and seals out water.
The night dive I did for my 50th was fun (in Cornwall in the UK). My buddies tried (unsuccessfully) to put a load of balloons on rocks at the safety stop. We then had a little cider, although a couple of folk lost their buoyancy with the reg/cider swap.
I was shocked to learn that DIVE TALK was about diving and talking. Who would have guessed that? I can totally understand why someone might be upset about all the dive commentary from a dive commentary channel. I mean gosh give us a clue next time! I will click the links in the description, certainly I will! ;)
LOL @3:33. I dig Woody's personality, but I'm cut from the same cloth as Gus. That being said, during these increasingly contentious times, here's a perfect reminder that people can have differing views and _still_ jive (and dive) with each other.
Sorry Gus but I love how Woody explains the situation they are talking about at 25:24. Gus is perfect tho in explaining things in a more controlled manner but I just can’t help but to love Woodys charismatic personality when he explains things. Thank you Gus and Woody for posting these video’s, it helps me out so much with my depression.
Friend of mine was freediving and a scuba diver offered him the reg at depth. My friend was freediving-trained but not scuba-trained and didn't know better. He ended up hospitalized with lung expansion. It does happen. And there are moronic scuba divers.
So a thought I just had while watching the night dive section at the beginning of the video. I really enjoy night dives, so I'm considering the idea of getting some glow in the dark tape to put on my tank that can spell out a specific word like my name or group. That way it's easier to stick together.
Love all your videos! Big fan of you both. Totally agree 100% with you, Woody, re the blowing bubbles. Yes as experienced divers we know when and when not safe to hold breath. However new divers are better off learning this rule when first learning. ❤
LMAO Gus says Sensible knife and proceeds to pull out a machete XD.. Also as part of my training I was told from the beginning not to suck air out of BCDs for exactly that reason, unseen bacteria ect.
I find it so funny that people are complaining you talk too much on a reaction channel with "talk" specifically in the title... ...there really are some special folks out there who need the phrase "Bless your heart"
Definitely kicking trying to get away will make it come after you. It's the same for most animals if you run away then theres a much higher chance that it's going to come after you whether it's to play chase or to take a bite
Most predators have a chase response that comes about the moment potential prey tries to flee. Not turning your back and running is almost always a good idea. Not to mention the fact that we can't actually outrun most large predators.
Banging on yout tank with the back of your knife is a very common practice for divers in the northwest. I remember being taught that in 2008 at my scuba class at the university of Oregon, visibility is bad in the northwest and that tap is easy to hear. Everyone I dove with at the newport aquarium knew that trick as well. Some dive buddies communicate with a tapping code
I’ll never be able to find the video…but I do remember one that showed a freediver / snorkel who wanted to check out a decompression habitat at a cave/cavern (Florida?) that had been setup. They held their breath when they left and surfaced…did not end well for them.
Experiment idea: bring an inflated balloon under water to demonstrate expansion then compare percent increase in circumference to a human. Details: Let some air out under water and add air back in under water that is equivalent to a standard inhale breath then resurface. Take diameter and circumference measurements at the start, at depth, at depth after "inhale," then again at the surface. Compare that to the standard diameter and circumference measurements of a person around their chest at the surface, at depth before and after inhale but continue breathing and scuba diving as normal, never holding your breath. Once the dive is over, calculate the balloon's percent increase in circumference and multiply it to person's circumference at depth. If it is not achievable size increase then my theory is the air would force itself out of your mouth instead of exploding your lungs. I dont think one's lungs would explode but agree the pressure build up damage the lungs. Maybe someone who didn't like peas as a child would be able to hold their mouth shut but everyone else is safely expelling the air.
Hey guys, I think Woody is absolutely right with the overexpansion lung thing. Gus the lungs are not like 2 ballons. You have such small particles like small bubbles where the gas exchange happens. And imagine freedivers holding breath while 100 meters of pressure forces the gas out of the lungs but they can still hold it. Do you think the lungs are stronger or the larynx. I guess larynxs is… Don’t get me wrong I love both of you👌🏽☺️ keep going with those awsm videos love it
I don't dive, but I'm on Woody's side from everything I've seen from y'all. I'm in the don't take avoidable risk camp. I think it makes sense to share air and slow ascent.
i prefer to go to my local shop for gear, but I did buy my fins online. A dive guide loaned me their fins while diving, and I really like them, found them comfortable and decent. So i got back and ordered them. my local store doesnt stock them, so i didnt feel too bad about ordering online
Gus: “I can go yell at my local guy at my local dive shop.”
Woody: “Or you can be NOT your normal self and ask him respectfully .”
I’m cackling 🤣🤣🤣🤣
So, I'm a doc who dives. Lungs are composed of little sacs with very thin walls called alveoli. These WILL burst with small elevations in depth causing air to collect in the space surrounding the lungs. We call the resulting little pockets of air in this space under the skin crepitus. They feel and look like little rice crispies that will collect around the base of the neck. It is NOT good to burst the little alveoli in your lungs. It should be avoided. Don't hold your breath going up. I'd go with Woody's suggestion of hold the snorkeler at depth with your reg and use your backup and bring them slowly to the surface while breathing.
The irony is that there has been so many of these pulmonary barotraumas from breath-hold diving-induced lung injury that it has its own medical and diving-related terms and there is significant instruction required about it in PADI and other accredited and respected diving instruction...and one must assume that Gus would have taught about it as a Dive Instructor.
Thanks for sharing doc // Excellent info to know.
I hate to muddy the waters here, but I think this would be an issue of lung volumes. If a diver at 33ft takes a breath to the vital lung capacity, say 6L, and holds while rising, sure you'll blow out the alveoli. But if you exhale to say half, at 3L the peak of tidal volume, that and rise while holding, that would expand to 6L at surface, and you'd let out a full breath. and if you exhale to the tidal volume to 2.5L or down to the expiratory reserve volume at say 1250ml and rise you'd probably hurt over those 33-66 seconds but more like a hypoxia hurt not a barotrauma hurt. But this doesn't take into account lung compliance and what is happening at the tissue level... just the pressures. One thing I don't understand from the physiology explanations in my dive class, and what Gus and Woody say, is that the lungs are compressed. The lungs are in the chest cavity, and I don't think the chest gets compressed much if at all. The wet suit compresses, so maybe the tissues and structures compress marginally. But from a dimension/measurement perspective the pleural volume (the volume of the chest cavity that holds the lungs) can't change much, otherwise we'd feel intesnse pressure on the chest when we dive. All that to say, I'm not testing my theory on my set of lungs (and neither should anyone else).
And i wouldnt' share with the snorkler - you can't "hold him at depth' cause how could you guarantee he won't bolt? do no harm.
@@CIPEIYTlmao padi is a clown fiesta.
That is called subcutaneous emphysema, not crepitus. It is an indicator of a lung overexpansion injury like pneumothorax. Crepitus is the crackling, unstable sensation indicative of a bone fracture or joint injury. Some describe the crackling feeling of subconscious emphysema as similar to crepitus.
"In my opinion, we're breathing in that bioluminescence and that's where I get the so special powers that I talk about."
"Okay, this just went south."
😂😂😂
Breathing the luminescence in the water ...
After all these years, they not changing a bit😂
Woody saying it’s not that people are idiots,it’s people panic and that’s the truth❤
No, no, the majority of humans are idiots, too. They’re just as dumb when they aren’t panicking.
As an idiot, i can confirm we are more prone to panic guys
Or just not panicking, its a double edged sword...
Not so much "stupidity" as it is lack of knowledge. People panic when they don't know what's going on.
NASDS used to require a "harassment day" in the pool before graduating anyone. The instructors and aids would harass the students, pulling off masks, borrowing and keeping regulators, shutting tank valves, and if you surfaced you flunked. The rest of the industry all said that could cause a death. NASDS said it was better to panic in a pool with lifeguards, than to panic and die in open water.
Woody taking about the algae giving him superpowers and Gus facepalming is just classic.
Woody is 100% in the right on the final lung injury segment! Gus's one argument was regarding ascending on a rebreather and how it blows up the cheeks, but that's not the same as holding air in the lungs. It's possible to do damage to your lungs simply by taking a deep breath and trying to force it out with the diaphragm while holding it back at the larynx. People have damaged their lungs in a similar way by trying to hold back sneezes. It's undeniably possible to damage your lungs on a fast ascent before the air is forced out of the, absolutely!
I can almost assure you that Woody is the type of person to end up surfacing to the wrong boat on a night dive, and would probably still have the same amount of fun and make new friends, as if he was in the CORRECT boat 🤣🤷
Woody could probably befriend anyone, even if he was picked up by Somalian pirates he'd probably charm their socks off
the Kramer of diving
Oh definitely.
Gus’s is not serious please no one try it out
@@SloppyJoe413lol what? Definitely not the Kramer of diving. Kramer is a lunatic.
I would love to befriend an octopus but they’re so intelligent they may decide they don’t like me lol
Back in the 1990s, while on a beach dive (Wood's Cove, Laguna, CA), an octopus, jetted out and wrapped itself around my dive buddy's forearm. Don't know if it was being extra friendly, or was a bit over ambitious about its next intended meal. Diving is always an adventure.
@@tomtom4405those are the ones that give me cute little hand shakes and then I feel funny
lmaoooo
They’d like you
@@michaelmoorrees3585when you have a squid on you is when you have a problem. They have fruit ballers in each tentacle
Definetely team Woody on hyperexpansion injury. Cheeks being filled with air when ascending on a rebreather only shows that our respiratory muscles are not strong enough (or lack mobility) to hyperinflate the lungs on themselves, but you are NOT locking the air passage in anyway in this case. When one holds their breath, there is also locking of air passage in the throat (like closing a valve or making a knot on a filled ballon). The whole idea of letting very small bubbles of is to help divers keep their throat muscles not engaged.
Also, neither a diver nor their lungs would pop like a balloon. Instead, some alveoli in their lungs would pop like micro-balloons. This would relieve pressure, so this lesion would probably only affect some parts of the lungs, but the gas release inside the thoracic cavity would very likely lead to embolism, etc.
Perfect explanation! 💯👏
I don't know how you're holding your breath, but I'm not locking my throat up when I hold mine! Yes, I can do it but usually when I hold my breath (free diving etc) I just breathe in close my mouth and stop breathing, why would you lock your throat out by squeezing your neck muscles?
@@computerbob06 not sure about the technique you are using, but tipically the muscles in your upper respiratory system will engage to prevent the air from escaping your lungs. This is much more effective than keeping your diaphragm, which is a larger muscle, contracted. The muscles involved in locking the airways are very complex and many people do not realize they are making use of them, but it helps if they pay close attention to the muscles that are activated to block the airways when they are swallowing (so things you ingest do not go to the lungs). If you are able to open your mouth and still not breath water in or air out, it is probable that you are locking your throat.
Also, the airways being shut is what keeps freedivers from breathing in water when they experience diaphragm involuntary contractions and spasms.
But if one person where to hold their breath while using inspiratory muscles only (holding the mouth shut is not possible with a regulator in it), then it would be ok, yes.
@@computerbob06you say free diving, but are you actually free diving to depth? Equalizing past 15 or 20 m requires the Frenzel technique which requires actively closing the glottis (“throat” muscles)
@@computerbob06 you may not think you are "locking your throat", but you are. Simply closing your mouth doesnt prevent breathing which is an involuntary process that must be actively fought against.
I love that you encourage folks to buy local. This is very important because your local shop needs to be supported to keep its doors open. It very important because it’s a pain to have to go a long distance to get service on your equipment or tank fills.
Gus in a cave: I'M FAST AF BOI
Agree! Students are not imbeciles or idiots just because they are learning the sport. This is why Woody is the right type of instructor to pick!
Why when gus said "if we had a humanoid of somekind" I immediately thought back to susanin diving in chernobyl with a fish bowl on his head?
Lake Hickory SCUBA did a video of a kid at Vortex springs who free dove into an air bell, and then returned to the surface. Definitely had a lung overexpansion injury!!
I saw that video
Gus can be so stubborn sometimes 🤣
This is a weird hill to die on
We are definitely here for the talking, my guys! God bless!!!
I think I understand why Gus is saying that, but I think he misunderstood the lung over expansion injury as the lung actually blows up. I think that's maybe because of the teaching part of this over simplified it. The long over expansion can happen where the micro tissue transfer air into our cell. Your mouse cannot hold the air till the long explode, because the long tissue as a hoe is very strong, but the micro tissue that does the breathing is not very strong, so if those micro tissue got damaged and lose the function of transfer air into our blood and the person will suffocate.
I will disagree with Gus here. 30 year medic (now retired), and it IS possible to have micro ruptures on an alveolar level doing what you describe. One can do it by coughing if it gets bad enough, especially if you are trying to bring up "stuff" by partially holding and coughing to create more outward velocity of air. In fact, many COPD patients get blebs for that very reason. Blebs are groups of ruptured alveoli. It is damage and it is (possibly?) permanent.
Hahahahahaha. Woody is as puzzled about Gus' theory on giving air to snorkler as Gus when Woody does his alien talks 😂
As a doctor, I have to admit that Gus is wrong about the lung damage. The truth is that you wouldn't be able to hold air with your cheeks and mouth alone. Please note that the cheek and mouth area is quite large, so strong muscles are needed to hold the air in - force is pressure x area. That's why you feel like you can't hold air while using the reb mouthpeace.
However, the problem concerns the throat and larynx. You can easily close the airway passage passively. It's not a perfect comparison, but try tucking your chin toward your chest and inhaling through your mouth - you'll notice that your tongue will block the airflow. Now, if you move your head back, you will immediately open the passage through the throat. Secondly, the passage area of the larynx is relatively small, so the vocal muscles can easily block the airflow. The same applies to the epiglottis - it can easily block the flow of air through the larynx. Therefore, during resuscitation, we tilt the person's head back to open the airway.
To me you guys are the face of diving, I’m currently halfway through my open water course because of you guys, and I thank you so much. I absolutely love it, and your videos make me want to dive much more every single day. Thankyou Gus and Woody for being awesome guys!
Never hold your breath while diving. It is absolutely true that someone can injure their lungs before it forces the air out. Also, I think on a CCR we use OPV ( over pressure value ) to solve the expending gas while ascending.
I got certified in 1975. Back then they showed some very explicitly gruesome movies (on 16mm film, no video). This was the time when they showed Red Asphalt, in Driver's Ed class, and there was a police trade magazine, showing very explicit accident photos. So in the same vein, in scuba class, we saw a couple of scuba accident movies showing lung expansion injuries. Usually fatal. That scared me to Woody's side, almost 50 years ago !
You can tell woody is an accountant when he talks about spending money 😂 ❤ very rational
Haha. That’s why we are here. We like to hear you guys talk.
I can`t thank you enough - you`re my favourite talk duo on youtube 🤩! Thank you for bringing up this important topic of other divers giving advice and your view on it!
P.S.: Just went diving on the Seychelles and was thinking of your dive talk. Catching up with the last few videos now 😀!
Gus isn’t taking into consideration the weakness of lung tissues. They’re very fragile. You don’t need to ‘pop’ the lungs like a balloon. Just a tiny, maybe not even visible tear can let gas into the pulmonary circulation, and produce an AGE.
Talk about your own lungs. My lungs are badass.
Love this channel! Educational and entertaining. Thanks for the amazing content! I’ll be taking my first ever dive course here in a few weeks, and this is very helpful
Woody is losing his mind 😂
Get the Russian bloke to test your theory he will test it! 😂😂
Believe me, the lungs will overexpand. The skill to hold breath is stronger than the lung.
Agree with Woody 100%. You can damage your lungs by holding your breath.
Very nice and unexpected shoutout! Awesome!
I hope to be on your channel one day to chat about scuba diving 😌
“You pull out your sensible knife” 🔪 😂 Got me!
Interesting discussion regarding the inability to blow your lungs up. I think cadaver experiment could solve this question. I would imagine that the aveoli which are one cell thick would pop first. That's my hypothesis. Great content, thank you!
I'm Team Woody with the breath-holding snorkeller. The snorkeller would get Barotrauma for sure in the scenario described. I would hold them tight and use my spare reg. Like Woody suggested.
Everyone should watch to the end of the video😂 I enjoy a good debate on Divetalk videos. I watch the one about the heart stabbing whenever I need a good mood boost.
As a newbie in diving I'm Team Woody on the NEVER HOLD YOUR BREATH part (sorry Gus!😂) Being a newly certified open water diver myself, sometimes I don't always notice that I'm ascending right away when i'm diving in the open water, esp. when the visibility isn't that great or when i'm distracted by marine life, so remembering to not hold my breath is the safer thing to do. Call me overly cautious but it's just not worth the risk imo🤷♀
PS: I'm a relatively new subscriber and as a beginner diver I absolutely enjoy watching your videos and have learned so much from you guys. Thanks for the amazing content, Gus & Woody! Love you guys🥰
Instead of a large carabiner I use a double-ender and a bungee loop to hold my fins (and mask generally is in the pocket of the fin). The double ender I can use for something else on the dive as well (if needed) as well as the bungee (it saved/helper me once with a broken piece of bungee which holds my inflator hose). Generally I clip it away at my butt d-ring (I dive sidemount) or place it in my pouch.
Feels a lot easier then a massive carabiner which can also clip easily (sort of) open onto a line...
same here, little paracord loops on my fin springs, that are just wide enough to take a doubleender
I got my first BCD and regulator used from a trusted local dive school. They would buy new gear every year for classes and would often have stuff for sale when you asked the shop owner. With the local dive shop I knew the stuff was religiously serviced, even if it was second hand and the guy always purchased really nice stuff for his own school.
Once the dive shop knows you are a good returning customer, chances are you will be first to be tipped off about nice nearly new gear whenever they find any.
Sarah is really an awesome person. Her advice is rock solid. You guys are point on all your reactions. Thanks for a great video.
I use to put chap stick on my mustache to help it seal and somehow on a dive one time it smeared all on the inside of the lens and I couldn't see shit for an hour long dive. Apparently we were surrounded by loggerheads on the dive and it ended up my worst dive ever hahaha.
Taping on the tank with a knife has been around for decades. I learned it when I was certified in 96' and my dad was a diver too, and he learned it in the 70's. Back then verry few people carried metal snaps diving. Back in the 70's it was also common to use a abalone iron to tap the tank.
I believe the mechanism for breath holding is called laryngeal valving and this valve closure in the throat is far stronger than the soft tissue of your outer lung lobes, meaning if you hold your breath and ascend on compressed air, your lungs will expand to their maximum point and the air can't escape through the laryngeal valve, so the expanding gas will find the weakest point, which will be your soft outer lung tissue. This is a fundamental concept in dive medicine and well documented through DAN. From DAN's article on Lung Expansion Injuries: Breath Holding during ascent forces gas into one of three locations: 1) the space within the chest cavity (pleural space), a condition known as pneumothorax; 2) the tissue planes within the lung itself (interstitial space), from where it may travel into the space around the heart, the tissues of the neck and the larynx (mediastinal emphysema); or 3) the blood. In this latter condition (arterial gas embolism, or AGE), gas bubbles can then pass from the pulmonary capillaries via the pulmonary veins to the left side of the heart and then to the carotid or basilar arteries (causing cerebral arterial gas embolism, or CAGE). See the link: dan.org/alert-diver/article/lung-expansion-injuries/ You said it Woody. People were gonna comment like crazy! Love your channel though. :)
Team AntiGus here. Even in OWD materials SSI says that your lungs can hold up to 0,12 Bar of extra pressure. So it means that you can have 1,2m of safe ascend on held breath. You are going to damage your lungs before you are unable to hold your breath no longer.
Gus got his OWD in a Kelloggs box by the misinformation he's letting out. When he should be letting out air 😂😂 😂
man.. i'm gutted you haven't included stuff from FlowState Divers.. those guys are really in the game of changing public perception of diving in general - in the best possible way
as a CCR diver I now (!) realise that Gus may have a point with the "chipmunk cheeks” on ascent. we are not really instructed to exhale on ascending (like on OC) because we can’t help but doing it ! it would be nice to have a scientific clarification on the matter of ascending head first, although I guess not many people would challenge the number one rule in scubadiving :) tks Gus for raising the point.
Woody, I do turn my light off on night dives, because if you hold still & turn off your light, and wait about 30 seconds, then when you turn it on again, you’ll have all kinds of marine life swimming around you! It’s an amazing experience! 😃
A 10 minute discussion on a short video simply highlights the high value of Dive Talk. It is entirely obvious you two have a high affinity for everything related to diving and that affinity drives you to educate people so they may share in the benefits with you.
The outcome is everyone safer
Everyone having more fun
Everyone more able to support one another
Woody is a damn treasure and Gus is the most awesome good friend, brother a free soul line Woody could hope for.
You two are exemplary ambassadors to diving, inclusive.
I love this show.
Woody is absolutely right about snorkelers. The difference here is that the snorkeler at 33ft wants to breathe due to high levels of CO2 while if he would breathe out of a regulator and rush up, he would need to exhale. Exhale dives are WAY more dangerous due to hypoxia.
I wonder if anyone uses silicone plumbers grease to get their mask to seal. We use it in plumbing because it’s non toxic and safe for potable water systems. I’ve gotten it on my skin daily for a very long time, and have never seen even the slightest adverse effects. I’m no diver, but the mask seal conversation got me thinking.
@Navy1977 if we are going that far we might as well just use flex seal tape. Making the mask a permanent fixture in doing so.
I wouldn't be concerned about my skin, but I wouldn't want that near my eyes
I was taught in the early 90s one of the uses the knife to bang the tanks. Of course number 1 use is to cut away.
Love the double ender Idea.
That's MermaidKayleigh guys. She's from Australia and her team swims and deflects those sharks a lot. They do it all breathhold but.
I try my best to buy local. I live in an area where 3-4 dive shops have closed up because people buy on line so much. I want dive shops around me. It make is so much easier for tank fills, equipment service and local diving charters.
Sharing air with a freediver already occurred with my daughter.
Me and she are just starting our dive at 10m, and an instructor came of nowhere, and took her octopus, and started ascending.
At the boat we understood the situation: a diver from other group passed out, and they need to leave immediately. The instructor tried to call us doing a freedive, because they think we are shallow and don’t want to take the time to prepare the gear. But as soon they found us, he needed air.
So, I think, as long the “freediver” knows what he’s doing, as a diver, it’s fine to share air, and do a proper ascent.
According to the tip we reacted to, you basically almost murdered this person - who would've died for sure if you didn't give them air - but apparently they need to die of drowning, for their protection.
How have I only just realised you dropped a new video 9 hours ago. God dam I must be slacking thanks for the new video & I already know it's going to be 49 minutes of pure bliss. Its always Top notch content cheers gus & woody you're both Killing it ❤
Favorite part is at 3:34 when the statement was "This just went south ... big time"
I wish Woody would do a video on these special powers. I’m laughing, but also serious!
I was just thinking guys, before my vision got so bad I was a quilter. I did a handpiecing in handcquilting, but I also quilted with my sewing machine. We always told beginners the same thing you tell new divers. Buy a good reliable brand of sewing machine from the shop that will service it. You not buy from the Internet, or a big box store, because neither one will service your machine, and that’s really important. Amazing, isn’t it? I bet you never thought there was a connection between diving and quilting. Right? Love you guys, Sandy from Cincinnati you were 80 year old fan.
Aww... woody lost it, but we still love him😂💕🥰
Night Diving Tips: Compass usage is critical and only dive someplace at night where you have dove before during the day so you know what to expect
Dive Gear: Only buy from your local dive shop. Support them because hopefully they have your back when you need them
I love how yall can agree and disagree 😂😂 and still be ok we need this in society
#1.) Slow is good. The sensory deprivation requires a bit more reaction time, too. It isnt always possible if youre also drifting, like in Cozumel. Sometimes the current is taking you faster than youd like...
#2) always know the captain's name and the name of the boat for the reasons you mentioned. Its really easy to get lost at night, especially if you ascend at a different place than was expected. Usually the captians in an area know each other and can radio your boat. #3)wear extra warmth, especially on your head. My last night dive, we had to wait on the surface for almost 20 mins for our boat. It was cool and windy and i wished i had a hood so bad! #4) I have that light. It's goood. Lasts a good long time and seals out water.
Woody saying “they’re all over there” got me lololol
It happened to you one time in band camp too. I thought I was the only one I feel so much better now.❤
The night dive I did for my 50th was fun (in Cornwall in the UK). My buddies tried (unsuccessfully) to put a load of balloons on rocks at the safety stop. We then had a little cider, although a couple of folk lost their buoyancy with the reg/cider swap.
I was shocked to learn that DIVE TALK was about diving and talking. Who would have guessed that? I can totally understand why someone might be upset about all the dive commentary from a dive commentary channel. I mean gosh give us a clue next time! I will click the links in the description, certainly I will! ;)
LOL @3:33. I dig Woody's personality, but I'm cut from the same cloth as Gus. That being said, during these increasingly contentious times, here's a perfect reminder that people can have differing views and _still_ jive (and dive) with each other.
Gus has lost his mind LOL!
Sorry Gus but I love how Woody explains the situation they are talking about at 25:24. Gus is perfect tho in explaining things in a more controlled manner but I just can’t help but to love Woodys charismatic personality when he explains things. Thank you Gus and Woody for posting these video’s, it helps me out so much with my depression.
Friend of mine was freediving and a scuba diver offered him the reg at depth. My friend was freediving-trained but not scuba-trained and didn't know better. He ended up hospitalized with lung expansion. It does happen. And there are moronic scuba divers.
So a thought I just had while watching the night dive section at the beginning of the video. I really enjoy night dives, so I'm considering the idea of getting some glow in the dark tape to put on my tank that can spell out a specific word like my name or group. That way it's easier to stick together.
Love all your videos! Big fan of you both.
Totally agree 100% with you, Woody, re the blowing bubbles. Yes as experienced divers we know when and when not safe to hold breath. However new divers are better off learning this rule when first learning. ❤
The torch is also what we use if we need to make noise against the tank. Not a knife 😅
I love the friendly dabate about the lung overexpansion 😂
God: Why did you die?
Mav: Because I was INVERTED and held my breath
XD
LMAO Gus says Sensible knife and proceeds to pull out a machete XD.. Also as part of my training I was told from the beginning not to suck air out of BCDs for exactly that reason, unseen bacteria ect.
Because of two of you I'm become a diver.
"Imagine pulling out your sensible knife"
Gus pulls out the Crocodile Dundee special. :)
Good stuff.
I watch that shark lady all the time. She is very experienced at it.
This is hilarious!!! 🤣
Gus has a point, lol
Clearly expansion injury is a thing though...
"They gonna rip the thing out of your mouth"
And thats what the big knife is for.
Lol
I find it so funny that people are complaining you talk too much on a reaction channel with "talk" specifically in the title...
...there really are some special folks out there who need the phrase
"Bless your heart"
I agree with Woody with the bubbles. Please treat me like a panicking idiot.
Definitely kicking trying to get away will make it come after you.
It's the same for most animals if you run away then theres a much higher chance that it's going to come after you whether it's to play chase or to take a bite
Most predators have a chase response that comes about the moment potential prey tries to flee. Not turning your back and running is almost always a good idea. Not to mention the fact that we can't actually outrun most large predators.
I could see the carabiner being useful for storage of equipment i guess
I love Gus’ commentary when woody gets going! Hope to catch y’all at blue grotto one day
Banging on yout tank with the back of your knife is a very common practice for divers in the northwest. I remember being taught that in 2008 at my scuba class at the university of Oregon, visibility is bad in the northwest and that tap is easy to hear. Everyone I dove with at the newport aquarium knew that trick as well. Some dive buddies communicate with a tapping code
“Don’t be Woody. Save a life.” Haha😂
Gus is probably right about the breathhold. I trust him, he is so sensible.
I love Gus but I think Woody is more sensible. Gus takes more risks.
I’ll never be able to find the video…but I do remember one that showed a freediver / snorkel who wanted to check out a decompression habitat at a cave/cavern (Florida?) that had been setup. They held their breath when they left and surfaced…did not end well for them.
I understood you when you was talking about holding your breath ive never dove but im learning so much
Experiment idea: bring an inflated balloon under water to demonstrate expansion then compare percent increase in circumference to a human.
Details: Let some air out under water and add air back in under water that is equivalent to a standard inhale breath then resurface. Take diameter and circumference measurements at the start, at depth, at depth after "inhale," then again at the surface. Compare that to the standard diameter and circumference measurements of a person around their chest at the surface, at depth before and after inhale but continue breathing and scuba diving as normal, never holding your breath. Once the dive is over, calculate the balloon's percent increase in circumference and multiply it to person's circumference at depth. If it is not achievable size increase then my theory is the air would force itself out of your mouth instead of exploding your lungs. I dont think one's lungs would explode but agree the pressure build up damage the lungs. Maybe someone who didn't like peas as a child would be able to hold their mouth shut but everyone else is safely expelling the air.
The Northern Light is a good example of a negative entry dive where you gotta hit the bottom before you miss the ship.
I think gus thinks lung over expansion injury is that same as a lung full out explosion which isn't the case 😂
Hey guys, I think Woody is absolutely right with the overexpansion lung thing. Gus the lungs are not like 2 ballons. You have such small particles like small bubbles where the gas exchange happens. And imagine freedivers holding breath while 100 meters of pressure forces the gas out of the lungs but they can still hold it. Do you think the lungs are stronger or the larynx. I guess larynxs is…
Don’t get me wrong I love both of you👌🏽☺️ keep going with those awsm videos love it
I don't dive, but I'm on Woody's side from everything I've seen from y'all. I'm in the don't take avoidable risk camp. I think it makes sense to share air and slow ascent.
Gus, I totally agree with you about the breath holding thing for divers.
As for the snorkelling lung overexpansion, I have no comment.
i prefer to go to my local shop for gear, but I did buy my fins online. A dive guide loaned me their fins while diving, and I really like them, found them comfortable and decent. So i got back and ordered them. my local store doesnt stock them, so i didnt feel too bad about ordering online
If it's impossible then Gus should absolutely prove that he is right in this matter. NO danger right?