Sam, the 20 something's tongue piercing is not real. The camera cuts to a shot of someone else's tongue piercing.
In this episode Carrie receives a phone call from Samantha and her voice over says she needs her morning Marlboro Light, however, when she picks up her pack of cigarettes, you can see that it is a pack of Merits.
Goof: When Carrie runs into her old boyfriend, a bus is visible behind him. In the next shot, the bus is not there. However, in the shot after that, the bus is visible again.
In the end of the episode, when the women are at the movie theater, the movie Godzilla is advertised. The movie stars Matthew Broderick, Sarah Jessica Parker's (Carrie) real life husband.
In this episode Miranda is accidently mistaken for being a lesbian, a few years later Cynthia Nixon would later come out as an actual lesbian.
Goof: After Carrie and Skipper pass the woman in the red coat, you can see a boom at the bottom center of frame.
Trivia: If you look really closely (and hit pause at just the right time) when Carrie shows off her column to the camera, you will see that her article is the exact same thing she has been narrating up until this point (and it repeats itself).
Trivia: This is the first time we are introduced to Mr. Big, and throughout the entire series, until the final episode, we never learn his "real" name.
Carrie's apartment is different in this episode then in all of the other episodes.
During the opening credits a bus is seen twice, the first time you see the bus there are people on it, the second time, 3 seconds later they have disappeared.
Mr. Big's car windows aren't tinted when he offers Carrie a ride. When she gets out and asks him a question, they are tinted.