Fire

Scully: Mulder, you just keep unfolding like a flower.

Mulder: I was merely extending her a professional courtesy.
Scully: Oh, is that what you were extending?

Mulder: That's weird. I was sure I locked it.
Scully: Must be an X-File.

Phoebe: Oh, come on don't tell me you left your sense of 
        humor in Oxford ten years ago.
Mulder: No, actually, that's one of the things you didn't 
        manage to drive a stake through.