:: Kids these days... the line is MUCH older than any of these. It dates at least to a little film noir piece called [i]This Gun For Hire[/i] (1942) - the Alan Ladd character says it to the Veronica Lake character in the train, when she accuses him of stealing her five dollar bill. The scene is iconic enough that it was "quoted" in [i]L. A. Confidential:[/i] it is the scene that's on Lynn Bracken's (Kim Basinger) movie screen when Bud White (Russell Crowe) first knocks on her door and sends her tough-guy-acting client home, and the dialog is clearly audible. Robert de Niro's character seems to me to be taking a cue from Alan Ladd's tough guy character, just as Lynn Bracken's client did 20 years later (on screen; or, "in universe," 20 years earlier).