That's pretty funny. If there's anything I've learned, it's that people are a lot tougher when they're in their cars. Get them out and most people turn to pudding.
I don't know if I'd have had the restraint that you had. I'd have probably tried to make her cry, just to be a jerk.
I used to ride bicycles with a pretty hardcore group of guys, and one day one of our riders called a guy out who cut through our paceline and nearly hit several of us. The guy wouldn't even get out of his car. It's not like a guy in spandex can do much, it's just that people feel really safe in their multi-ton steel cage.