Under the Table

A man and a woman were having dinner in a fine restaurant. Their waitress, taking another order at a table a few paces away noticed that the man was slowly sliding down his chair and under the table, with the woman acting unconcerned.
After the waitress finished taking the order, she came over to the table and said: "Pardon me, ma'am, but I think your husband just slid under the table." The woman calmly looked up at her and replied firmly: "Oh no, my husband just walked in the door."