You never know what you'll find on YouTube. This is Philip Glass's "Openings" on a marimba, of all things. I'm very fond of this piece as it was composed for the piano. The 3-on-2 rhythm makes it sound more complicated than it is; a piano amateur can easily play it. How this guy can get the same effect with four mallets in two hands, I have no idea. I love it, despite the false notes sprinkled in.