Generation Kill: Don't Desecrate Your Mask

Inigo Montoya: You are wonderful.
Man in Black: Thank you; I've worked hard to become so.
Inigo Montoya: I admit it, you are better than I am.
Man in Black: Then why are you smiling?
Inigo Montoya: Because I know something you don't know.
Man in Black: And what is that?
Inigo Montoya: I am not left-handed.
[switches sword to his other hand]
Man in Black: You are amazing.
Inigo Montoya: I ought to be, after 20 years.
Man in Black: Oh, there's something I ought to tell you.
Inigo Montoya: Tell me.
Man in Black: I'm not left-handed either.
[switches his own sword to his other hand]
– The Princess Bride (1987)