Oh my god, what the hell ?!!?
:D
That proves that the japanese are truly crazy!
:D

It's fake. There is a crane cable making him move. I saw a clearer video of it and could see the cable.

They tried it on Mythbusters and were unable to get it to work. The guy would have been spinning madly in a forward roll (which is what happened to the test dummy) instead of flying in a straight line.