In previous and subsequent episodes, the door to Larry and Balki's apartment is to the right of the fireplace (when facing the door). However, in this episode, Jennifer and Mary-Anne exited and Larry and Balki enter the apartment through a door to the left of the fireplace.
(the security guard locks the window while Larry and Balki stand on the ledge)
Balki: That sounded like the guard locked the window.
Larry: Balki, please tell me that the guard didn't lock the window.
Balki: The guard DIDN'T lock the window.
Larry: Oh, thank God. OK, we'll go back inside.
Balki: We might have a little problem with that.
Larry: What's that?
Balki: The guard locked the window.
Larry: Balki, you just told me that the guard DIDN'T lock the window.
Balki: That's because you told me to tell you that guard DIDN'T lock the window.
Larry: Well, why don't we go there and see if indeed the guard locked the window? (Larry tries to open the window) The window is locked!
Balki: Perhaps the guard locked it.