At around 3:45 in this video (work safe) you can see someone riding what appears to be a motorized unicycle. But haven ridden a unicycle myself, I don’t understand how you would keep your balance without pressure on the pedals. Also he appears to brakes on the down side of the ramp while his arms are in the air.
Can someone identify this contraption for me? At these kinds of events I would think there are a lot of home-made things around, but this one seems to have a factory made fender. Thanks.