Many years ago in Luanda during the civil war in Angola Air France took the B747 to Gaberone for crew rest and flew back to do the scheduled LAD CDG flight in the evening, therefor crew hours were tight.
The baggage was lined up on the tarmac and boarding passengers had to physically hand their baggage to the loaders to put in the containers.
We were all onboard waiting for departure and the captain said there was a piece of baggage left on the tarmac, could the owner please identify. Nobody was forthcoming so all the baggage was unloaded again and we all had to go back down and go through the procedure again. This time all was identified.
As the doors were closed the captain who was extremely pissed off by now, announced that seat xxx was the cause of the delay. I imagine with a whole lot of pissed off people now glaring at him he was suitable reprimanded. The delay was over 2 hours. I missed my connection home.