Someone posted the video earlier of Reese Humphrey doing this exact move in a college meet. Fast Forward to about 8:00 or so. The other guy attempts a bear hug and Reese does the backflip (and gets called for a penalty). Would take unbelievable athleticism to pull this off. You say a HEAVYWEIGHT was doing this?? Woah!
http://www.flowrestling.org/videos/coverage/view_video/234547-sunday-brunch-ohio-state-vs-hofstra/129463-133-2-reece-humphrey-os-dec-9-lou-ruggirello-h-7-4
that is called a salta