Once - I remember at a job I had, we would all be called to help pull a truck (unload the pallets of freight off the truck), and there was an issue where the trucks would always arrive when people were on their lunch period and / or people would outright ignore the request to come help. I remember I was the only one there to unload a truck of some twenty-something pallets, and, as I was unloading it, I would continuously walk by a co-worker who actively pretended to not see me despite the fact I had to go around him some five or six times. Eventually, I called him out on it and just outright told him he needs to go help, and I remember he snapped at me, told me to "watch my fucking mouth," and yelled.
He was an older guy (in his late-forties) and had been a manager at the company before, so I think he had the opinion he could get away with it. He walked to the back, got one single pallet and yelled, "There, are you fucking happy?" and ran off. Unfortunately, we weren't alone at that point, and the wrong person heard him - he was fired and that was that.
A few years later, he came back to the company and was buddy-buddy with me, and I never had a problem with him again.