What would be the best comedic sentence to quickly end a conversation?

"And there you have it..the answer to all the world's problems"!

Yours being of a sexual nature might be offensive to some people..where mine is sort of smart asz...

The one I found truly funny was 'I gotta see a man about a dog, excuse me'...at least it was polite, but left me with a 'huh?' reaction... really, what do you say to that?

I also like, "pardon the interruption, but I have a crisis to avert".... I have left several folks scratching their heads over that one...and they were truly curious to know what's going on.. even though there wasn't a thing going on except my desire to get away from them...LMAO

me : do you have internet

friend: yes..! why

me : have you ever been to shut the hell up . com???

friend ; -_-

"Call me again when you can't talk so long."