From the lips of the incomparable Jack Nicholson, this rude but clearly to the point of not wanting to be disturbed in the movie As Good As It Gets.
Melvin Udall: Never, never, interrupt me, okay? Not if there’s a fire, not even if you hear the sound of a thud from my home and one week later there’s a smell coming from there that can only be a decaying human body and you have to hold a hanky to your face because the stench is so thick that you think you’re going to faint. Even then, don’t come knocking. Or, if it’s election night, and you’re excited and you wanna celebrate because some fudgepacker that you date has been elected the first queer president of the United States and he’s going to have you down to Camp David, and you want someone to share the moment with. Even then, don’t knock. Not on this door. Not for ANY reason. Do you get me, sweetheart?
He of course later redeems himself mostly because of his love of a good woman played by the wonderful Helen Hunt.