Back in high school there was a feller going around giving everybody a black eye, thought he was tough. I figured he needed a whipping so I told him to meet me in the bathroom after class. Soon as he walked in and spoke a word I threw a right jab and layed his nose sideways. I punched him til he wouldn't raise his head up anymore. I looked him up a while back, and he's got 2 dozen mugshots. He did land one on my jaw, but didn't phase me. Almost 30 yrs ago
Only other confrontations didn't involve fists just twisting arms til they cooled down.