Mal:"I'm risking my crew on the theory that you're a real person. If you're not, you might as well shoot me now..."
[River cocks the gun she is pointing at Mal] Mal:[stammering] "Ooooor, we can talk some more..." -Serenity
I really would have liked to have asked for the whole speech (from the movie, not the trailer) because of the music (it really drives home the point he's trying to make) but it is pretty long. So I chose the best part and that's good enough for me!
I've got a jar of dirt! I've got a jar of dirt! And guess what's inside it! - Jack Sparrow "Dead Man's Chest"