i remember working with my mum in FS and we called on a big(ish) house with one of those traditional bell chains. I pulled it expecting to hear the jangling of a bell but nothing happened. we carried on talking to each other. then I said to my mum "did you hear the bell ring?" she said no and tried pulling the chain. again nothing. so I said "I think it's stuck" so I pulled. By this time we were laughing. so my mum then pulled the chain trying to get it to ring. and so it went on. Suddenly a man's head and naked torso appeared out of the upstairs window, completely dripping wet, so stressed he was almost crying and shouting at us "what's your problem ringing my bell like that!" he went on. at which point I noticed that the chain simply connected to an electric bell so the poor guy must have been in the bath or shower listening to the insistent ringing of a door bell. We were laughing for ages about that but how annoying lol
There was another time I was working with an elder's wife and on her door this young lad answered and said "sorry, I can't stop I've got to wipe the kitten's bum". We were both laughing so much that her husband had to split us up.