I watched LA Confidential last night and this morning, and it's full of really good lines. Here's my favorite.
Straight-laced Lt. Ed Exley (Guy Pearce) and hard-nosed, volatile Bud White (Russell Crowe) follow leads about their case to District Attorney Ellis Loew himself. They meet him in his office, and he rebuffs their attempts to get information about his connections to their crooked captain. After some give-and-take, he tells them to leave, and goes into an adjoining bathroom. Bud White follows him in, and looks menacing, until the DA tells them: "Come on, don't try this 'good cop-bad cop' crap on me. I practically invented it..."
Bud White slams his head against the mirror a couple of times, then pushes his head into the toilet for repeated dunkings and flushings. When the information still isn't forthcoming, Bud drags him back into the main office, slams him through some protective wooden railings and holds him by his legs out the seventh floor window. As he dangles there, screaming in fear, the DA finally gives up the information. Bud drags him back in and dumps him on the floor of his office, where he lays there quivering in distress.
Ed Exley delivers the line with understated calm: "Was that how you used to run the good cop-bad cop?"
