https://www.youtube.com/watch?v=Ws6AAhTw7RA
Related: https://www.youtube.com/watch?v=4HHJv8lPERQ
And more awesome: https://www.youtube.com/watch?feature=player_embedded&v=Zqmd...
It's already 3 years old, so I'm waiting for people to use this technology or an extension of it for something cool.