This is either a fake video, or this is one brave dude. The video looks so real, if it is a fraud, it's skillfully done at great expense. The daredevil defends himself thus:

"All doubts were unfounded. The 35.2-meter jump distance was the first Softslide practice test with real people (me) under real conditions. I think the last doubters now the words are missing."

Is this legit? It all looks right, but the audio is a little too good — notice how clear the sound is as he's sliding down the hill, and then the equally audible sound of the water splashing. But then, he could've set up a series of wireless mics.

Megawhoosh, via Today's Big Thing and Gizmodo