Man controls nature heh heh...
The music ("dogpile") is made by a danish band called "Sial". See more at http://myspace.com/s ialband (thanks to euclidessn for the link)
Regarding whether the video is a fake or not i leave that for you to decide and believe.
a slap on a stomach filmed using a high-speed camera. waves are seen to propagate around the stomach. notice how the hand sinks into the skin at impact.
