It's sort of a tie between two. Thankfully these are VERY mild "altercations" but it made me more mindful of my surroundings and the situations I found myself in.
1) I was at a party with a lot of drinking going on (always a good decision), and some guy totally drunk was harassing/groping gals in the house. So a host asked me and a couple guys to escort him outside for "fresh air" and get him to go, if possible.
We cordially talked for a while, he was barely coherent at times, insisting he couldn't leave because his friend was inside.
So he hangs out on the front porch smoking, and we had talked about the Cubs and White Sox, then he out of the blue starts shouting at me asking why I think the White Sox suck (I think that's what he was saying). And at that point, I was about 30 feet from the guy. I said I don't really care, I just want to have a good time, but this suddenly fires this dude up. Like he looks menacing.
And he starts charging at me. In a sort of drunken stumble way.
I was shocked, but prepared to just hit the dude or something....until my friend pulled some kind of martial arts move, and intercepted him on the way to me and basically shoved him over onto the ground. Everyone laughed and things were okay, the guy stumbled around then my friend took him for a long walk and when they got back, he wasn't as belligerent or drunk. And I was done for the evening. It was like the 3rd "fight" that had broken out and that was fully my cue to leave the area.
2) Was in high school, and myself and a few friends were getting some groceries at a store for a sleepover at a friends house. On a whim, we jokingly bought super balls while walking out from those gumball machine things.
We bounced them pretty high when we stepped out of the store - there was a huge canopy over the entrance/exit area with steel girders. My friends' super balls all dropped right at them, but lucky me had his hit a girder and bounce away.
I went to retrieve it, and as a I did, some guy yells something at me, and walks up in my face. Like an inch away, barking some nonsense at me, that I'm a punk and my punk friends are using foul language (...don't remember that...no idea) and throwing things at his wife and him.
I was stunned and said we didn't throw anything at them, then he grabbed me by my letterman jacket's lapels and pulled him up against him.
I told him it was in his best interests to take his hands off me (not my exact words) because he's breaking the law. His response was that laws don't protect punks like me. So I said, hey we'll call the police and find out if they do. Or maybe he should just let me go before I "did some damage he wasn't going to walk away from" (my exact words).
His fired up expression changed and he loosened his grip, let me go, then backed away. He then walked away towards his car, which his wife was already in. I followed him shouting that he was an idiot (stupid thing to do - again, high school age kid) and this is the best part....
His wife had locked the doors to the car and wouldn't let him in.
He had to stand outside of the car and knock on the windows, looking like a fool.
I walked away with my friends and we got in our car and drove away.
Thankfully, these are the most dangerous altercations I've been involved in. I have no desire to outdo these.