There's a whole thought on GF in "YOU"VE GOT MAIL" when Joe Fox (Hanks) trys to explain to Kathleen Kelly (Ryan) why GF is so important in their everyday dealings with other people. He tells her to "go to the mattresses" when she encounters a cutthroat competitor.
At a dinner party Joe trys to recreate the horse's head in the bed scene, which completely goes over Kathleen's "head". It's hilarious!
Joe (Tom) does a fair Vito Corleone impression!
"Go home Mike. Go home and bury your wife and child."
"It won't be that simple."