Guess I will repeat a story again. Started my Bultaco without the seat and tank on and the top of the carb not screwed on. Quick blip of the throttle while sitting on the bike, wound the fuk out! Kill button didn't stop it, saw the sparkplug wire arching, pushed the wire to the frame with my thumb to kill it like a lawnmower, pissed my pants. Dad laughed so hard.