Have you ever had the disconcerting experience of having someone come flying past you on a monowheel skateboard? I think the 'disconcerting' part comes from how relatively quiet they are, at least as compared to old-school skateboards and longboards. When someone comes shushing past you down a sidewalk (or in the street) on a monowheel, it's in many ways a more surprising experience.
Now, imagine for a moment what would happen if someone took that concept and made it into a vehicle that the rider saddles up and rides like a motorbike. Only, instead of just one wheel, it has so many more, and they all cooperate to operate what looks kind of like a big yoga ball to actually make contact with the ground and move the rider around.
The saddle, incidentally, still looks an awful lot like a motorbike saddle. And for what it's worth, the handlebar situation that inventor James Bruton came up with to steer this contraption resembles one found on a motorbike, as well. Technically, it's powered by a motor...but perhaps the word 'bike' isn't quite right here. Multiwheel Menace? Maybe (and I say that with both surprise and admiration, not aspersion).