Music controllers are all the rage nowadays, thanks to your Rock Bands and your DJ Heroes, even your GameCube Jungle Beats. Now, some whiz has managed to hook up an obscure instrument for some retro action.
The theremin is known for its spooky sounds and for being the only instrument you can play without physical contact. Your hand's proximity to the two metal antennas jutting out determine both pitch and volume, which in this setup controls Mario's horizontal and vertical control respectively. It looks pretty manageable, albeit a bit hokey. Apparently the setup allows a bunch of other instruments to be used, like a violin or even a microphone to yell at the screen and jump.
Eat your heart out, Natal: