Start a Fire like the Iceman / Mr. Denjiro's Happy Energy!

DENJIRO: Today's theme is combustion. First up, did you know that I could breathe fire? Of course, there's a trick behind this. I secretly had a container with very fine powder in my hand. The powder is very fine and flammable, so when I blew it toward the flame, it gave the illusion that I was breathing fire.
Next, let's try to start a fire. Have you ever heard of the Iceman, the oldest natural human mummy that was found in Europe? He had some mushrooms in his possession, which are said to have been used as tinder for starting fires. But is it really possible to start a fire using a mere mushroom? Let's try it out!
First, we shave a dried mushroom. Now, let's light this on fire with a flint and steel. It caught fire! When the hard flint strikes the steel, little bits of steel burn due to frictional heat. They fall onto the mushroom and start a fire. But not everything can be used as tinder.
Here's a piece of cotton. You would think that cotton is very flammable. But it doesn't catch fire. Why is that? Let's compare cotton and a mushroom under a microscope. Mushrooms are composed of hyphae, which are much finer compared to cotton fibers. That is what makes mushrooms more flammable.
The mushroom that the Iceman had in his possession had pyrite attached to it, so it is assumed that's what he used as the flint. Now, let's use pyrite to start a fire the way it was done 5,000 years ago! The main component of pyrite is iron sulfide. When it burns from frictional heat and becomes iron oxide, sparks form.
I started a fire! We believe the Iceman started fires using mushrooms and pyrite, just like this.
I hope energy will bring you all happiness. Our magic word is "Happy Energy!"