After both Monica and Rachel lose in the lightning round, they are to give up their apartment to both Joey and Chandler. Later on when the guys are moving their stuff into Monica and Rachel's apartment, Rachel comes out whining that both she and Monica shouldn't have to move.

Then Monica comes in saying "Look Rach, we have to move. I mean if WE had lost, we would’ve made them get rid of the birds. Right?" The problem is the girls did lose the game and instead Monica should of said "If THEY had lost..." Too bad the editors didn't catch this.