This is one of the coolest (and funniest) movies I've seen of Sketchy Physics models.
Someday, someday, someday I will learn how to do this, and write a great book showing everyone how it's done. In the meantime, I'm just blown away by people's ability and creativity!
Here's another one by the same modeler, more sinister than funny, with a Star Wars theme. A lot of stuff gets smashed and broken - awesome!
Anyone can design anything in 3D! http://www.3dvinci.net/