This is the closest thing I have to a bicycle. I use it for UAR (Urban Assault Riding; something I invented) which is basically riding starting at one point and finishing at another. Getting there any way possible using any route you want as fast as you can. This includes riding down stairs and jumping down them, jumping down ledges and riding on train tracks, jumping little gaps, if you can; riding on roofs, riding over sewer pipes (scary as fuck) going on sidewalks and through skateparks and dirt tracks. Cutting across baseball parks, riding on the street. (The bikes we use are dual sport. Can legally go on and off road), people's backyards, and if you're ballsy, open air shopping malls. (I have never done that one) We're lucky if we get above 30-40 mph doing this riding. What makes it interesting is the terrain and course you choose. It's a lot of fun and I will get some pictures up soon.
That's the bike I use. Kawasaki KE100. Lucky if I ever go over 40.