The waitress watched as the man slid all the way down his chair and out of sight under the table. Still, the woman appeared calm and unruffled, apparently unaware that her dining companion had disappeared.
The waitress went over to the table and said to the woman, "Pardon me, ma'am, but I think your husband just slid under the table".
The woman calmly looked up at her and said, "No he didn't. He just walked in the door".