"That'll be the door"

When I have found myself lost for words in the midst of a conversation that I have taken down a suicidal cul de sac with a loose word/phrase or two, I find it better to mutter the phrase 'That"ll be the door' and make a quick exit. That way you"re able to excuse yourself from the conversation and the room so you can chastise yourself in private and out of ear-shot. A warning to those who aren"t too clever: don"t use this phrase if you"re trying to exist a conversation on a mountain side or on a beach.