Not positive what season it is, but it's the episode when Dylan McKay and Antonia (Toni) Marchette get married. The next day, Steve & Nat come over to bring the new couple breakfast. When Dylan & Toni come out of the bedroom to answer the door, Toni has slippers on, then the camera turns to Steve & Nat & when it goes back to Dylan & Toni, she has no slippers on! This all happens in a matter of seconds.