Let's take it old school, guys.
How about Humphrey Bogart and John Ridgely in "The Big Sleep"?
Eddie Mars: Convenient, the door being open when you didn't have a key, eh?
Philip Marlowe: Yeah, wasn't it. By the way, how'd you happen to have one?
Eddie Mars: Is that any of your business?
Philip Marlowe: I could make it my business.
Eddie Mars: I could make your business mine.
Philip Marlowe: Oh, you wouldn't like it. The pay's too small.
Classic, hard boiled, tough guy talk from one of the best private eye movies ever made.
Fnord