The Tango sports bike is basically a single-wheel motorcycle, an all-electric personal transportation vehicle created by two high school students from Oakville, Ontario.
The Tango has two side-by-side wheels, and it uses an R6 Yamaha frame with hand-machined parts. It uses electronics to detect angle of tilt and motion.
The Tango (see photo) can reach top speeds of up to forty miles per hour.
Science fiction fans may remember the tumblebug from Robert Heinlein's 1940 novel The Roads Must Roll:
This great prototype vehicle is much cooler than the Eunicycle Single-Wheel Gyro-Stabilized Scooter, but maybe the Bombardier Embryo design might look a little cooler (but no prototype). Also, see an illustration of Heinlein's tumblebug from the original story publication in Astounding Science-Fiction for June, 1940.
(This Science Fiction in the News story used with permission from Technovelgy.com - where science meets fiction.)