OK, this is in the realm of the Jet Powered Beer Cooler as far as practicality is concerned. But it is so cool. The site is in French, but the film is without dialog. I love how it begins with a Swiss Army knife. The home made spot welder...
http://paillard.claude.free.fr/
Scroll down to "La vidéo."
Moderator, feel free to put this wherever it belongs if this is not it.
Clark
Sorry, dropped my antecedent - here is the Beer Cooler http://www.asciimation.co.nz/beer/
Why am I getting the feeling that Subwoof could easily do both of these projects if he wanted to?