From the ArcaMax Publishing, ArcaMax Publishing Newsletter:
http://www.arcamax.com/news/arcapub/s-568870-628857
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. The waitress watched as the man
slid all the way down his chair and out of sight under the table.
Still, the woman dining across from him appeared calm and unruffled,
apparently unaware that her dining companion had disappeared. After
the waitress finished taking the order, she came 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 replied firmly, "Oh no, My
husband just walked in the door."