I present to you, the Daxophone.
It consists of a platform and a wooden device called a "tongue", which can be bowed, plucked or struck to produce very surreal and cartoonish sound effects, there's tongues of many shapes and sizes to produce various tones and effects. They were designed in a way that they can emulate both the sounds of a human voice as well as other musical instruments.
Here's the flash website of it's creator, almost all of the sound effects and music you hear are produced with the instrument.
The guy has some other odd instruments too.
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I dunno if this guy is completely insane or a musical genius. But I know one thing for sure, I need to download some of this guy's cds.