I have not, but I did throw a punch in fear once. Yes, it landed and I still feel ashamed about it.
It was the last time I went to Mardi Gras, so 1995 I think. I was moving through a crush of people, which is hardly uncommon at Mardi Gras, and was bumped into a very drunk guy, also not uncommon, who spilled his drink all over me. He was enraged by this, threatened to kill me and seemed to be winding up to hit me. So, I popped him In the chin. Not a solid hit, I’m no fighter and not terribly imposing, but he went down like a sack of wet cement - probably because he was so drunk he might have just passed straight out had I left him alone. I looked around to see if he had any friends and didn’t see any so I sort of propped him up and left.
So yeah, thinking back I handled that poorly and regret that it happened. I’ve resolved not to let myself resort to violence and kind of “count to ten” or something to keep my head. I don’t want that to happen again.