If you go to YouTube and search "Smith Motor Wheel Ride" you can see it on a bicycle. Since I haven't figured out how to get link with my iPad, that's the best I can do from here. When I get home, I will get more info up.
There are also videos of other ones that are running.
I believe stopping was a matter of killing the throttle. if you google images of the SMW you will see a lot of great pics.