well this title says more about the thread than snakes on a plane says about the movie. dan pointed out the similarity to me.
Maybe a little.
If you were sitting inside your wheel.
Uhhhhhhhh…
sure 
Maybe if your unicycle had no seat and you were walking it with your ass.
Lol, you should learn that one 
Uh, looks like a person in a wheelchair to me. You must look at more unicycles than wheelchairs…
Judging by James Potter pic. I’d say you could have a unicycle like that. Only if your cranks are extra wide and you’re sitting on it and riding it like a recumbent bike.
Like a BC wheel???
I’ve been looking for different versions of the sign that may support the hypothesis but I’m afraid I’m still going to suggest glasses.