These are actually really awesome. I tried one out this weekend but i'm a fool and didn't record any of it.
Basically you can rent these things for relatively cheap. I have seen them around the downtown and uptown. It's a dollar to start & 15 cents every minute after that. At 18mph, that's a pretty dope deal.
When you're done you literally leave it on wherever the block your destination is.
Have you tried one of these?