[CobraEd]

A man is flying in a hot air balloon and realizes he is lost. He reduces
height and spots a man down below. He lowers the balloon further and
shouts, "Excuse me, can you tell me where I am?" The man below says, "Yes,
you're in a hot air balloon, hovering 30 feet above this field."

"You must be an engineer," says the balloonist. "I am," replies the man.
"How did you know?" "Well," says the balloonist, "everything you have told
me is technically correct, but it's of no use to anyone."

The man below says, "You must be in sales." "I am," replies the
balloonist, "but how did you know?" "Well," says the man, "you don't know
where you are, or where you're going, but you expect me to be able to help.
You're in the same position you were before we met, but now it's my fault."