When Phoebe starts talking about no one likes Chandler in his work place, Chandler has nothing in his hand. However in the next shot, he suddenly has a green mug in his hand.
The level of wine in Monica's glass during her date with Ethan changes several times between shots.
Chandler and Phoebe are in Chandler's office standing by the window talking about how Chandler is the "Guy in the big office." They walk away from the window and Chandler sits on the side of the desk by the door and then Phoebe is seen walking over and sitting down in Chandler's chair. Then it cuts to just Chandler and then we see Phoebe's head pop into the shot as she is sitting down again.
Monica states that she might be a felon after sleeping with Ethan, who is 17 years old. While the age of consent is 18 in California where the show was filmed, it is 17 in New York, where it is set.
But Monica says "might be a felon"; she is quite not sure and hopes that she is not.
But Monica says "might be a felon"; she is quite not sure and hopes that she is not.
When the friends joke about Ethan's age and tease Monica about Power Rangers, Ross says "morphin' time", to which Joey responds "Stegosaurus". However, at least at the time this episode was aired, Stegosaurus is not a dinosaur species featured in that show.
However, this cannot be considered as a goof but purely a funny joke.
However, this cannot be considered as a goof but purely a funny joke.
At the end of the episode when Ross falls over the couch looking for the phone the black mat used to soften the fall can be seen underneath the table on the left of the couch.
In the opening segment right before the opening credits, they are sitting in Central Perk and Rachel has her hand under the coffee pot.
You can see the edge of a black mattress behind the couch when Ross jumps over it after learning that Carol is in labor.