Same here, some guy had been bullying me in high school and calling me names for a long period. One time he came to the park where I was in my friends and started calling me names again and generally being belligerent. After the second punch he fell down, he didn't really need much more than that. He didn't even get the chance to lay a finger on me, and never looked me in the eye again.

Come to think of it, shit, he really wasn't tough at all. Going down on the second punch and coming back up dazed? Good thing (for him) I didn't know how to throw a punch...