Ahem...
Cnet News - Toilet motorcycle runs on human poo power (http://news.cnet.com/8301-17938_105-20115555-1/toilet-motorcycle-runs-on-human-poo-power/)
(http://i.imgur.com/6Q2d0.jpg)
CitazioneMove your butt over, Prius. Japanese toilet manufacturer Toto has a new take on a green driving machine. The Toilet Bike Neo combines a three-wheel motorcycle with a latrine. The kooky contraption runs on biogas.
Biogas is just a fancy way of saying poo power. In case you were wondering where the source of the stool is supposed to come from, the bike's built-in toilet should answer your question. It doesn't leave much to the imagination. Could we get a privacy screen, please?