Those are the guys from Reservoir Dogs. Reservoir Dogs starts with the guys in a diner arguing over the ethics of tipping. I don’t know what movie that’s supposed to be an easter egg in, but the point is the guy is in the same diner.
Look at the edge of the piano. I don’t recognize that movie, but I’m betting it’s not The Maltese Falcon.
Second line from the bottom.
From the movie:
Jimmie: [interupting] No, No, No, No, let me ask you a question. When you came pulling in here, did you notice a sign out in front of my house that said “Dead Nigger Storage”?
Jules: Jimmie, you know I ain’t seen no…
Jimmie: [cutting him off again; getting angry] Did you notice a sign out in front of my house that said “Dead Nigger Storage”?
Jules: [pause] No. I didn’t.
Jimmie: You know WHY you didn’t see that sign?
Jules: Why?
Jimmie: 'Cause it ain’t there, 'cause storing dead niggers ain’t my fucking business, that’s why!
It’s a reference to the new My Little Pony show, specifically this character.
Well, I’d have won the bet then. I figured the movie was Casablanca but wasn’t sure, and so the Maltese Falcon being there was what was out of place. That’s what I get for being coy, I suppose.