Yes, just once. some knob (my cousin's new boyfriend at the time) came over to settle some family stuff that he was never part of, trying to be a hero to her.
(At our other cousins huge wedding).
Was standing over our table, yelling, threatening, etc. I was trying my best to not have a scene, told him we can take it outside and not ruin the wedding.
He then decides to slap a drink off the table in front of me onto my lap, when I jumped up (because of the drink), he lunged at me. I threw a punch, it landed nicely, knocked him out.
(I'm told it was a good one anyways, it was a flash and I barely remember it, I remember everything before and after it though, sort of weird that 1 second rush/blackout adrenaline snap).
Anyways, that was it, huge brawl in the middle of a farking huge wedding party erupts after that punch. That dude got dragged out once he came to, cops came, the whole thing.
Too bad the phone thing wasn't around back 20 years ago, could have been a good video memory for me. (Not for my other cousins wedding though, I got the blame because I won I guess).
And no, I'm not a fighter/tough guy, just something that happened...
Crazy ass family anyways..