A woman in a hot air balloon realized she was lost.
She reduced altitude and spotted a man below.
She 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’re in a hot air balloon hovering approximately 30 feet above the ground.
You’re 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?”