Your comment reminded me of a motorcycle racer I knew who was paralyzed from the waist down. He had a few funny stories about coming off his bike and having his legs broken and bent like a pretzel. The track martials would come over and just about faint at the sight of it, he often had to calm them down. He'd get looked over by the medics and drive himself to the hospital to get a cast put on.
It's not something you should do deliberately for sure. Because he wasn't able to move his body weight on the bike the bike had to lean even further than any other rider so he was often very close to the edge. He also always had to start from the back because he had to have people to launch him.
