And I'm not so sure about a hoax -- he's got the power to weight ratio to hang on the prop like that for sure
Fake. It was done as a promotion for somebody. There's a thread or two on Pprune about it. Nice editing, though. Numerous YouTube videos of RC models doing this. If it were "real" it would have been on every news channel in the world!
http://www.pprune.org/flying-instruc...loss-wing.html
Numerous little clues ... initial spin rate and rotation, engine sounds like a Cox, and the "Ruuuuuuuuunnnnnnn" at the end is a little heavy-handed ...