if you knew anything about skateboarding, you would know this is fake.
he kicked the board out from his feet on purpose
when he went to do his Nollie, if you watch closely.
he dives forward deliberately kicking the board out from his feet, if he was actually doing a Nollie he wouldn't be falling forward. and when the camera panned up that would've been the cut, then they just filmed him hanging and falling from the roof. And From the Part where he looks up and looks down, somehow hes magically on the other side already -.^
Haha both of you are wrong. The wheels gets stopped my a little rock,....you can hear the wheels skid for a sec when he rolls over the rock before he is lunged forward.
Pay attention to the sound.