The Solowheel by Inventist is a battery powered gyro stabilized unicycle that can be folded up and carried when not in use. Watch how the riders glide by like Roman conquerors in this video demo.
Externally, the Solowheel consists of a wheel and two foldable foot platforms. Internally, the inner workings of the Solowheel use gyro sensors, a 1000-Watt motor and a rechargeable Lithium-ion battery. All this technology is housed under a visually appealing, slim case with leg pads and a handle for easy carrying.
photo via TechnologicVehicles