You don’t really need to watch the entire video, but here’s Gaus Wheel, a monocycle mixed with a scooter?

Looks interesting on video at least… but of course, only a real experience trying to ride it will really show how good that is.
For starters, I dunno how stable this is, how breaking works (if it has any breaks)… but I imagine falling won’t be very nice on those.
Well, not unlike skates and some other stuff with wheels…

Source: TechEBlog