At the end of the episode, George (Jason Alexander) is smoking in the restaurant but in another episode, Kramer (Michael Richards) gets kicked out of the restaurant for smoking.
In the beginning when George (Jason Alexander), Jerry (Jerry Seinfeld), and Elaine (Julia Louis-Dreyfus) are first talking at Monk's about the stock, George's drink fluctuates from cut to cut from half full to full.
Jerry implies to his girlfriend Vanessa, walk around the house naked. When, in fact, in "The Apology" (Season 9), he doesn't like it when his girlfriend Melissa always walks around naked. He thinks it's not natural as he says towards the end of the episode.