What Jim share here is the seven bows type of Jin which develop with formulae 2014 within YKSLT. Or refer as the snake engine.
YKSLT at MIT
https://m.youtube.com/watch?v=YZaqAKreJ9M
I don t know about snakes, but this looks like feeding crane to me, I am seeing this coupe of times per week . I can do this also ,so what , nothing special , no secrets , no chi flow , just proper alignment of the body