Oh cool! I looked at that and said, "Funny, that looks like an Isetta." And it actually *is!* Though I would guess that they didn't originally come in lime green.
My parents were briefly Isetta dealers, sometime before I was born. I had a little toy Isetta car when I was a kid.
At the Rolling Sculpture Car Show a few years back, Arbor Motion gave Reid's dad, John, a trophy for something like Heroic Efforts in Automotive Maintenance, in recognition of the work they put into getting their Isettas on the road. They even have website devoted to them here: http://www.isettagarage.com/index.html