Plot hole: When Elaine is searching for Jean Paul in the streets, one of her verbal flashbacks is of Jean Paul saying, "I trust Elaine, she is my friend." However, Jean Paul made this remark to Jerry, and Elaine was not there to hear it. How could she have a flashback of it?
Deliberate mistake: When Elaine comes home and doesn't find Sean Paul there, she runs to her neighbour across the apartment. The neighbour opens the door and stands outside it then the door slowly closes behind him. Suddenly, the door opens again with a swoosh without anyone being there. Because the camera switches angle right after this, it is apparent it was opened to gain this shot or to at least permit it continuity wise.