It's copacetic don'cha know.
I did indeed have to look that up
I learned that from my cousin...and had it reinforced by a Minnesota National Guard unit I was attached to for deployment.
Back OT:
I have always like the idea of a monocycle. I even engineered on for that Battletech game. I had the thought of a bunch of crazy people on monocycles armed with machine guns chasing down Locusts and other small engines of destruction.
I can just imagine what a Go-Gang equipped with these would do....especially if they had smart wheel tech.