On my lunch time wander I came across (well he nearly ran into me) a bloke on a single wheel thing with stationary pedals either side of a foot high wheel. He was getting along with a high pitched hum. It was weird but kinda cool. Looked like a cross between Mall Cop and Star Wars. Any ideas??
electric unicycle? (bit older than the above and a bet more 'seated' position)
Like most things, Airwheel act like they invented the sh!t, but the above pic has been avail for years......
kind of explains how it works. you're unlikely to have your wig blown off, but great what kind of terrain you can go over