The elevator despatcher said to her: "Your husband just went up, and I think he's looking for you."
She took the next elevator up. Just then her husband came down. He looked all around and then inquired:
"Have you seen my wife here?"
"Yes, she went up this minute."
He took the next elevator and was just out of sight when she came down.
"Your husband has just gone up."
"Then I'll go right up, as he'll wait for me this time."
Down came her husband a second afterward.
"Did my wife come down again?"