On the DVD interview, Jason Alexander confesses he was furious with Larry David for not writing him into this episode, and insisted that he must be in every future episodes, even just for a bit part.
This is the only episode in which Jason Alexander does not appear. Michael Richards doesn't appear in it either, but he was also absent from The Chinese Restaurant (1991).
Larry David learned of the pen that writes upside down from executive producer George Shapiro who owned one. He gave it to David during a meeting.
Jerry sleeping on sofa cushions on the floor was inspired by Jerry Seinfeld's real-life experience. When visiting his mother, Seinfeld would sleep this way to avoid the uncomfortable sofa bed.
Aunt Stella (Magda Harout) mentions she's missing Golden Girls. The actress had a part on The Golden Girls (1985) in 1988.