Goof: When Monica answers the door and sees her father, she says, "Hey Dad, what are you doing here?" However, her lips barely move at all and the line sounds like a voice-over.
Trivia: When Chandler and Ross are sharing and Chandler mentions the girl at the Xerox place with the belly button ring, Ross agrees that he sometimes pictures her. This is the same girl that Ross sleeps with later in the season when he and Rachel are "on a break".
Goof: Monica is supposed to be all depressed in this episode, because of her breakup with Richard. But in the very first scene she looks perfectly fine when walking into Central Perk discovering the people sitting in their usual spots.
Trivia: In this episode it's noticeable that Jennifer Aniston did some exercise between seasons. Her face looks thinner and overall she appears toned.
Goof: In the scene where Janice tells Chandler about "Joey and Janice's day of fun" the position of her hair changes from in front of her shoulders to behind between shots.
Goof: At Monica and Rachel's, Ross gets a chocolate ice-cream bar out of the freezer and takes a bite. In the very next shot, however, the ice-cream bar is whole again.
Trivia: When trying to figure out his kissing problem, Joey asks one of his friends to kiss him. Phoebe agrees, saying she's kissed him before. They kissed in "The One With Two Parts (2)" when Phoebe was pretending to be her twin sister Ursula.
Goof: When Joey comforts Chandler after he found out that his Internet girlfriend is married, the computer screen is clearly off.
Goof: In the scene where Monica and Phoebe are discussing Monica and Richard's "wedding" there is an obvious cut. Monica starts by the kitchen table, but when the camera faces the couch Monica has moved over there instead and is now behind Phoebe, not in front of her.
Goof: In the teaser scene when Monica grabs the mug from the coffee table and licks it before telling Chandler "There you go, enjoy your coffee," the mug is clearly empty.
Trivia: This is the first of three episodes in which Joey gets a job at a friend's place of employment. In "The One with Phoebe's Uterus", Ross gets Joey a job as a tour guide at the museum. In "The One with the Girl from Poughkeepsie", Monica hires Joey as a waiter at Allesandro's for the express purpose of firing him.
Trivia: This is the second of two episodes in which Chandler gets one of the other friends a job where he works. The other episode is "The One with the Ick Factor" where Phoebe becomes Chandler's assistant and finds out that none of his subordinates like him. In both episodes, Chandler comes to regret getting his friend the job.
Continuity: When Richard and Monica are in bed she says that she has to sleep on a certain side of the bed. However, later when Monica and Chandler get together, Monica is always sleeping on the other side of the bed.
Goof: Rachel's wealthy father has come to visit his daughter on her birthday, but hasn't even brought a present.
Continuity: Joey kissed Rachel's mom to help distract her. But in "The One with Mrs. Bing" he explicitly says that you can never kiss a friend's mom.
Trivia: When Chandler gives Rachel a comforting hug in the hallway, there is a slow instrumental version of the chorus of the Friends theme, "I'll be there for you" playing.
Trivia: In this episode, we hear Rachel's mom's name, Sandra, for the first time.
Continuity: When Rachel mentions her family and what they did on the Fourth of July, she doesn't mention her sister Amy, played be Christina Applegate, who appears in Seasons 9 and 10.
Note: Although Rachel only mentions her sister Jill by name, at the beginning of the episode when Monica is making up the guest list, Ross says, "I talked to Rachel's sisters--neither of them can come".
Goof: When Chandler is herding all the male guests into Monica and Rachel's apartment and all the women into his and Joey's apartment, Monica complains that he's hoarding all the women. However, when you look at the guests in both apartments, there is a fairly even split.
Goof: When Ross and Chandler go to the coffee house to "stand their ground," they take one sip of their coffees and run out of the coffee house without paying.