This song was one of the most fun songs I've yet written, there's a certain tension and excitement at the same time it is quite soothing. I picked notes just running my hands back and forth over the keys, but in different patterns to get different effects. One of the reasons I love the Pentatonic scale, though I don't always use it.

Copyright and attribution info:
I recorded this using ButtonBass.com's piano app, under a Creative Commons License (Attribution 3.0 Unported.) The app only supplied individual note samples, I myself arranged them, recorded the song, and post-processed the audio.