As another semi-pointless counter-story, I was in SF once at a red light and I noticed a guy jumping out at cars on the road, but not actually moving towards them, just lifting his arms up and flailing.

So, my teenage self decided to teach this guy a lesson. When I started driving towards him, before he could jump at me I turned my car at him and drove right in his direction. It scared him half to death and he jumped backwards.