The EniCycle is a self-balancing unicycle that you don’t pedal, and it looks like serious fun.  Based on gyroscopic wizardry like the Segway Scooters, it keeps its balance and moves forward, backward, left or right based on which way you lean or press on the foot rests.  Hit up their website for tech specs and an 8+ minute video that explains it in more detail than this jolly rumpus.
