One movie I haven't seen mentioned yet is..... The Fifth Element!
Korben Dallas: We need to find the leader, Mangalores won't fight without the leader.
Aknot: One more shot, and we start killing hostages!
Korben Dallas: That's the leader.
Aknot: Send someone to negotiate.
Fog: [as Dallas looks at him] Uh, I-I've never negotiated before.
Korben Dallas: Do you mind if I try?
Fog: No, sure, sure, sure.
Fog: We're sending somebody in to negotiate!
[Corben walks into the room and shoots Aknot between the eyes. As he falls, the other Mangalores drop their weapons and bow over him, keening]
Korben Dallas: Anybody else want to negotiate?
Fog: Wh-where did he learn to n-negotiate like that?
President Lindberg: [looking at General Munro] I wonder.