Chinatown

— Tell me, Mr. Gittes, does this often happen to you?
— What's that?
— Well, I'm judging only on the basis of one afternoon and an evening, but if this is how you go about your work, I'd say you'd be lucky to get through a whole day.

— I hope you don't mind. I believe they should be served with the head.
— Fine. Long as you don't serve chicken that way.

See, Mr. Gitts, most people never have to face the fact that at the right time and the right place, they're capable of anything.