Ages ago, I saw a guy playing a set of drums made from a bike.

He played this:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

(Incidentally, I know about the weird broken layout to do with comments. Not sure yet how to fix it, got broke by a Disqus update. Edit: Fixed! Although in a supremely hacky way…)