I thought this was kinda cool, check it out.

Sorry for the lame audio quality, compressed kinda owned it hard.

Thread: http://forums.epicgames.com/showthread.php?t=74354
Vimeo: http://www.vimeo.com/14568219
Game Blog: http://marbleudk.wordpress.com/
Github: http://github.com/spilth/marbleudk