Tim: Actually, you have spent a lot of time up on the roof. You ever noticed anything odd in the sky? Unusual sights?
Al: Uh, Tim, not with the aliens again.
Tim: No, I'm talking about UFOs, spaceships, that kind of stuff.
Al: I think the audience wants to talk about roofs, not about people from outer space.
Tim: You're awfully defensive about this.
Al: There are no aliens.
Tim: How do you know?
Tony: Hey, maybe he's hiding something.
Tim: Yeah, maybe he's hiding the fact that he's an alien.
Al: I am not now nor have I ever been an alien!
Tim: Oh, yeah? What do the first two letters of "alien" spell, Al?
Tony: Ooh...
Tim: And your mother's quite large. Perhaps she's the mothership.