I recently had such an experience.
The car ahead of me was doing stupid things; I wanted to yell, but I couldn't ketchup in time to say anything.
Finally, she pulled over and I got out and said, "I want to be frank with you, you're a bad driver. Your skills behind the wheel simply don't cut the mustard." I was on a roll.
I was red hot.
When she got out to talk to me, I immediately noticed that she had nice buns. Sexist, I know. She also seemed to have a rather sauer personality, but I let it go.
Anyway, I told her my beef and grilled her for a few minutes about her driving habits. We then shook hands and both got back into our respective cars and drove away.
Luckily, I got a picture of her car, just in case the police need it in the future. Here's what it looked like: