Great Dialogue.

What is great dialogue? Obviously this differs from person to person, but I'd like you to post a section of dialogue from one of your favorite movies, books, graphic novels, or maybe something you've written. I'm interested in everyone's perspective, and I'd enjoy it if we all share our favorite character interactions.

I'll go first. Here is a excerpt of the Watchmen movie(while I prefer the comic book version, I found the movie to be a tad more realistic):

Adrian Veidt: [Nixon finishes his speech on Veidt's TVs] Do you see? It's your super powers retreating from war. I've saved the Earth from hell. We both have. This is as much your victory as it is mine. Now we can return. Do what we were meant to.
Rorschach: We were meant to exact justice! Everyone's gonna know what you've done...
Adrian Veidt: Will they? By exposing me, you would sacrifice the peace so many died for today.
Dan Dreiberg: Peace based on a lie.
Adrian Veidt: But peace! Nonetheless.
Jon Osterman: ...He's right. Exposing Adrian would only doom the world to Nuclear destruction again.
Laurie Juspeczyk: No... we can't do this.
Jon Osterman: On Mars, you taught me the value of life. If we hope to preserve it here, we must remain silent.
Rorschach: Keep your own secrets...
[the others look as Rorscach leaves, then Jon and Adrian make eye contact]
Dan Dreiberg: Don't even think about it.
[Goes after Rorscach]
Dan Dreiberg: Rorscach! Wait.
Rorschach: [Turns] Never compromise. Not even in the face of Armageddon. That's always been the difference between us, Daniel.
[Leaves the building]
Adrian Veidt: I've made myself feel every death... see every innocent face I've murdered to save humanity.
[Turns to Jon]
Adrian Veidt: You understand, don't you?
Jon Osterman: Without condoning... or condemning. I understand.
Rorschach: [Outside, in the snow, Rorscach comes across a copy of Jon standing in the snow] Out of my way. People have to be told.
Jon Osterman: You know I can't let you do that.
Rorschach: Suddenly you discover humanity. Convenient.
[Takes off his mask]
Rorschach: If you'd cared from the start, none of this would've happened.
Jon Osterman: I can change almost anything... but I can't change human nature.
Rorschach: Of course, you must protect Veidt's new Utopia. One more body amongst foundations makes little difference. Well, what are you waiting for? Do it...
[Jon hesitates]
Rorschach: DO IT!
[Jon makes Rorscach explode into a pile of blood]
Dan Dreiberg: NOOOOOOOO!