I was sitting in rush hour traffic at a stoplight where an (allegedly) homeless guy was panhandling. The guy walked up to me & tried to get me to give him some cash. I kept refusing. Just as the light changed & traffic started to move, he reached out with his toe & flicked down my kickstand, killing the engine. Took me a couple moments to get restarted & moving, with some unhappy drivers POed behind me. I almost went back to give him a lesson in the error of his ways, but with the heavy traffic and a cooler head than in my youth, he got a pass.
I have to grudgingly admit, it was a somewhat ingenious & mostly harmless way to get back at me.