I believe the original form of this joke goes like this: Lost man in a balloon yells down at a man on the ground “Where am I?” The man on the ground responds,

I believe the original form of this joke goes like this: Lost man in a balloon yells down at a man on the ground “Where am I?” The man on the ground responds, “You’re in a balloon” The man in the balloon says “You must be a mathematician”. “Why?” asks the man on the ground. “Because your answer is absolutely right and absolutely useless”