The video for "Ain't No Grave", a cut from Johnny Cash's last album is pretty amazing, in part because everytime you see it, it's never the exact same video.  It's also amazing because you can contribute to it.

The Johnny Cash Project is an Herculean effort to create a music video for that song from an huge number of drawings — each done by a different person — traced over simple frames that, strung together, become what you see below (or similar to it).

Visit the website to add your own frame.