After George leaves Jerry's apartment, with the woman he is dating, Janet, Jerry shoves Kramer across the kitchen, and the freezer door swings open. Later, the freezer door is shut, even though nobody closed it.
When Jerry (Jerry Seinfeld) & Kramer (Michael Richards) are talking in the kitchen, Kramer says one of them should leave. The fridge door is open then, but a couple of seconds later it is seen closed.
In episode 7.6, The Doll (1996), Sally (Kathy Griffin) is described as "a big executive for FedEx." It seems unlikely she would now be a struggling actress.