A few years back, I borrowed a friend's electric standup scooter to run an errand. While going very slowly to get the feel of the scooter, I tested the brakes and the front one seized. I was projected over the handlebars, blowing a tendon in my wrist.
The first surgery was an attempt to transplant another tendon to pull things together. It didn't take, resulting in a second surgery to fuse the wrist. Be careful. I don't recommend this to anyone.