George: What'd you do that for?
Jerry: She was looking for someone to go to the show with.
George: Well, that was a really stupid thing! You know what's going to happen now?
Jerry: World's collide.
George: Well, yeah!
Jerry: Because this world is your sanctuary and if that world comes into contact with-
George: Yes, it blows up! So if you know that, what did you tell Elaine for?
Jerry: I didn't know. Kramer told me about the worlds.
George: You couldn't figure out the worlds theory for yourself? It's just common sense. Anybody knows, you gotta keep your worlds apart.
Jerry: Yeah, I guess I slipped up.