This Man Made An Instrument That Uses Marbles

Wow. Just wow. This popped up at the top of Reddit today, and I initially counted myself a skeptic. But holy Moses, this might be one of the coolest contraptions I've ever seen. And to top it off, the music is amazing.

The process took 14 months for Berlin-based Wintergatan to complete, and he's got a number of interesting videos about the process up on his Facebook page. Needless to say, that effort wasn't wasted.