Picture a one-wheeled Harley-Davidson running nitrous...

Being quite enamored by our recent posts regarding three-wheeled motorcycles as alternative transportation, and bolstered even further by our recent find of two-wheeled cars, I decided to check out the possibility of one-wheeled motorcycles. I don't have much information besides these pictures, but I thought that you'd like to see them anyway. I searched Google using all manner of terms, but, alas, I came up with nothing but these. Are these one-wheel motorcycles? I'm not sure. But, I do know that I would not ride one on the street! I like my two-wheeled motorcycle just fine... and, to be honest, I am not sure that it is possible to register something like this for the street. Now, off-road is another story, I'd give it a go there. Of course, if you knew me, you'd know that I have managed to injure myself in all sorts of ways on two wheels off-road. But, that's another story...

(see more after the jump)
The modern-looking design below is the Bombardier Embrio, circa 2003. Bambardier is also the company behind the Can-Am Spyder, so perhaps they have been looking for alternative transportation solutions for a while. It is also powered by a hydrogen fuel cell, and uses gyroscopes to stay upright. It weighs 360 pounds.

We wrote about the Wheelsurf last year, but I'm looking for more. Does anybody know about other machines like these, which I have christened "Unimotorcycles"?