HL2: DM | jm_psyjumps_r1 lvl 8 slowed down w/ keys

This was meant for John Fingerman, that's why I did not care about net_graph on, despite local. But I figured it might help others and so I'm publishing it. It's technically part of one of my future TODOs anyway.
Here is one for jm_psyjumps_r1 lvl 10 • HL2: DM | jm_psyjumps_...
Check out my HL2: DM - Movement Training guide on Steam: tinyurl.com/529fwkwf or search "Ade" in the Guides section.