When George (Jason Alexander) is calling Jerry (Jerry Seinfeld) on the phone, Kramer (Michael Richards) can be seen with his suit closed, but when Jerry's girlfriend arrives, the suit is open.
When Kramer comes in to ask for Tums and Jerry responds it is on top of the refrigerator, Kramer picks up a pack a Alka-Seltzer.
The doctor tells George (Jason Alexander) that he'll have trouble walking due to extreme inactivity, but he was just playing frolf (disc golf), which is a very active game.