I'll also apologize to Zoomers for taking over the thread.
Cynic, I think in yoga what you're showing is referred to as a bridge (although clearly not the official name).
Isopach, I agree that your's is also a bridge, in gymnastics (and maybe martial arts?).
wow ive been tryin the back thing isopach does, and its only my second day doing it and im almost to the ground. i think i get close and freak like im gonna fall lol. the only bad thing i noticed is my neck got sore from doing it yesterday. oh well. sorry to interrupt thread topic again!