Chandler: What the hell are you doing?
Joey: Well, you wouldn't let me in, so I thought you were in trouble.
Chandler: Well, we're not.
Joey: But you called me "Bert." That's our code word for danger.
Chandler: We don't have a code word.
Joey: We don't? We really should. From now on, "Bert" will be our code word for danger.