> A man in a hot air balloon realized he was lost. He reduced altitude and spotted a man below. He descended a bit more and shouted,
"Excuse me, can you help me? I promised a friend I would meet him an hour ago, but I don't know where I am."
The man below replied, "You are in a hot air balloon hovering approximately 30 feet above the ground. You are between 40 and 41 degrees north latitude and between 59 and 60 degrees west longitude."
"You must be an engineer," said the balloonist.
"I am," replied the man, "How did you know?"