I had a 1986 Ninja 600, my first street bike. It was probably five years old at the time. I was in a Safeway parking lot getting ready to go inside or whatever. Key was in the ignition, bike was in gear, probably because we were on a slope. As I sat waiting wth my hands on the handlebars, I accidentally bumped the starter button. Unfortunately the gear safety was disabled by the PO. The bike lurched forward, and pulled my right shoulder righth out of the socket. I think I might have rode the bike to my brothers house, but maybe not. Took THREE HOURS from dislocation, to my shot of Vicodin or whatever it was at the time. What a painful three hours, but the stupid ER insisted on an x-ray before they would give me meds.
I was about 19 at the time.