Penny leaves the Evans' apartment with her can of cookie winnings after beating J.J. and his friends in a game of poker. We assume she is heading back to her apartment, however, she is heading in the direction of the elevator (the opposite direction). Other characters make this "mistake" from time to time when supposedly going to/coming from Wilona's apartment. Wilona's apartment is supposedly across the hall from the Evans family - the door you see whenever the apartment door is opened.
There has never been a transfer of title; therefore, Bookman's sale of his 1954 DeSoto was never official.
Poppo tells Thelma to love him or leave him, and she says bye and slams the door. When she does, the entire wall moves.