LANDO: I've just made a deal that will keep the Empire out of here forever. (whispers) *shhh* Now, listen, behind those doors is Darth Vader. He arrived here before you did. OK, Han, the thing is, you try to shoot him as soon as I open this door. He is unnarmed, he dosen't have his lightsaber with him. All you gotta do is shoot him right on his neck, ok?
SOLO: Why, Lando, I'm not so sure about this... Shoot him? I mean, I only shoot when people shoot back at me...
LANDO: There is no time for this, Han! I pretended to make a deal with Vader so I could get him into this tiny, little room with no ways out. All you gotta do is shoot him.
SOLO: Why don't you just lock this door and let him starve to death?
LANDO: No, he can get out, he has that... uh... force thing. You are the best blaster shooter in the galaxy, c'mon, just shoot him!
SOLO: Uh-uh, no way. Why don't you shoot him? Or Lobot there?
LANDO: Han, please! Shoot him! I'll open this door and you just shoot him... Please...
SOLO: Oh... all right. I'll shoot him. But I'll shoot his hand, I don't kill people who hasn't tried to kill me before.