After Peter had worked an all night shift and was fast asleep:
Me: "Peter, what time did you want up?"
Peter, while emphatically tapping his watch with a finger: "I don't know, about Buhbuhdubaba"
*I start laughing*
Peter: "What's so funny?"
*I repeat what he just said and begin to leave the room (he obviously isn't ready to get up yet)*
Peter: "Oh no, is it really THAT LATE?"
He woke up about an hour later with no recollection of the conversation.