Starting from the very beginning..
Washing up/general skivvy in a pub that had a lot of OAP's bussed in on weekdays for lunch.
Lunch service started at 12. We closed at 3.30pm. Food stopped at 2.45.
At 3.20pm, I am the only one left in the kitchen, everyone else has naffed off home except the barman who is mysteriously AWOL... there is a banging on the kitchen door.
I get berated by two old ladies, who arrived at bang on 12 and have been steadily eating their way through their meal since approx 12.25, with at least three refills of roasties and veg (we did free top ups of 'all the trimmings' hence being so popular).
They are very angry because all the staff have vanished and the barman has told them we are closing and how DARE I..yes, me, the pot washer, stop serving them food when they still have room for more. AND what was more.. we'd made them feel TERRIBLY unwelcome for turning some of the lights off (in the areas that were now empty of people, not where they were nor their route to the exit!)
I dunno what the problem was, the rest of their gang were making their way back to the bus, so I don't to this day understand what they thought they were going to do, stay til evening opening hours and get a cab?
I invited them into the kitchen and offered them anything they could find in there to eat, there was nothing and apparently this also was RUDE and they'd tell my manager (good luck she went home hours ago!).
They left when the bus driver came back in to fetch them, and then the bar man reappeared giggling nervously. I wasn't best pleased!
Many years later... some of my first ever dog training classes.
Week three of puppy class, the owners of a gorgeous but very whizzy busy little breed stayed back to complain...
They'd followed all the advice to get their puppy to listen, stop biting, stop tripping up the kids etc etc... and now whenever they said his name or entered a room, he would...
Run up and sit smartly and wait for an instruction.
This was apparently terrible. I never did find out why!