Two Wheels Good, One Wheel Better: Ryno Electric Unicycle
The trouble with most vehicles is that you can't drive them on the sidewalk. Or through a hotel lobby--people tend to object.
Neither of those are concerns with the Ryno, an electric, self-balancing unicycle, the brainchild of Ryno founder Chris Hoffman.
The Ryno wasn't actually Chris's idea, but that of his daughter--who one day saw something similar on a videogame, and asked if dad could build it.