Dr. Craig Allen Bittner claimed that his patients actually requested that their fat be used to power his car. You know, for the environment's sake. But of course, he also recently shut down his practice and moved to South America after becoming the target of a bunch of lawsuits, so he's not exactly the most trustworthy source in the world.

But powering a car with human fat is in fact possible, although the fat, like animal fat, would need to be treated to remove fatty acids. Lots of companies such as Tyson and Nova Biosource are looking to power their own fleets of vehicles with the animal waste that they produce already.

But really, the main question is this: what did it smell like to drive behind Bittner's Navigator? I'm not sure I want to know. [Forbes]

In theory, the toilets' self-cleaning mechanism is capable of spraying down the whole interior with water jets and detergent every day, but the drainage systems quickly became clogged with trash, rendering them completely useless. Drug fiends and prostitutes were also fond of the 20-minute auto-locking doors, but the depravity quickly became too much for everyone, says the NYTimes:

“I’m not going to lie: I used to smoke crack in there,” said one homeless woman, Veronyka Cordner, nodding toward the toilet behind Pike Place Market. “But I won’t even go inside that thing now. It’s disgusting.”

[eBay via NYTimes]