Regruntled.com

Animoto is a web site that makes videos.  You can upload some pictures, select some music, and Animoto will put together a video for you.  It’s all very automatic.

The obvious comparison is with Windows Movie Maker.  Animoto has fancier transitions, but Windows Movie Maker has more capabilities.  Animoto makes decisions for you, Windows Movie Maker puts you in control of the details.  Different strokes.

This is more difficult than it looks. See Eirik Solheim’s web site for the technical details.

I’ve seen kite surfers do something like this over the ocean, but water is soft compared to rocks.

Jean-Yves Blondeau is a human skateboard.  His Buggy Rollin site is mostly in French, but there is some English.