Thats when you speed up and make them crap their pants.

I wont get too much into it...
but when I was a bit more "reckloose".. some guy was walking like a jerk in the middle of the street but taking up the whole street (one lane) He refused to move to the side so I pulled right behind him and drove with my car literally a foot behind him. He then gave me a smart ass look and turned back around. I threw the car in neutral and reved hard and loud and scared the crap out of him.

So i feel your pain..