Continuity mistake: When Nani tries to open the back door and tells Mr. Bubbles to wait outside, the back door has a door knob and an upper deadbolt lock. Then, when Nani opens this door from the inside, there is only a door knob of a different style without a keyhole, and the upper deadbolt lock is gone. As Mr. Bubbles enters the home, the deadbolt lock is back on the door. In later shots the door knob also has a backplate, and it disappears along with the deadbolt lock. (00:17:20)