rayman 101 said:
"Luke... I AM YOUR FATHER!"
-Darth Vader
No such line. In the movie, it goes:
"Obi-wan never told you what happened to your father..."
"He told me enough. He said you killed him!"
"No... I AM YOUR FATHER!"
My personal favorite might be... hmm, maybe that one scene from Fistful of Dollars, after a bunch of playful cowboys decide to scare Clint Eastwood's character's horse.
Troublemaker 1: Go get your mule. You let him get away from you?
Stranger: Yeah, see that's what I want to talk to you about... he's feelin' real bad.
Troublemaker 1: Eh?
Stranger: My mule. Ya see, he got all riled up when you went and fired those shots at his feet.
Troublemaker 2: Hey.. you making some kinda joke?
Stranger: No.. see, I understand you men were just playin' around, but the mule, he.. just doesn't get it. 'Course, if you were to all apologise...
They all laugh.
Stranger: I don't think it's nice, you laughin'. ...See, my mule don't like people laughin'. Gets the crazy idea you're laughin' at him. Now, if you'll apologise like I know you're going to, I might convince him that you really didn't mean it.
They reach for their pistols; he guns them all down.
I hear most of the movie was based on Akira Kurosawa's Yojimbo, and apparently this scene was no exception... but I still feel it was well orchestrated in this instance, as well.