Continuity mistake: When Ross introduces himself to Mona, the reception place card that Mona's holding switches from her left hand to her right hand, between shots.
Continuity mistake: Rachel and Monica are talking about Phoebe getting pregnant at the table. Rachel's hands change every time where the camera is showing them in a different angle.
The One With The Red Sweater - S8-E2
Continuity mistake: When Chandler mentions about the disposable cameras to Monica to cheer her up, Joeys hands are together. Next shot they are apart. (00:00:50)
The One With The Red Sweater - S8-E2
Continuity mistake: When Monica asks, "What do you think it is?", regarding a present, it suddenly switches hand depending on the shot. (00:04:50)
The One With The Red Sweater - S8-E2
Continuity mistake: Monica is sitting in the living room with all her wedding presents, waiting for Chandler to return. She begins to open a large parcel and reveals a brown cardboard box. Then the camera moves to Joey, and when it moves back, the parcel is wrapped up again. This happens about three times. (00:05:05)
The One With The Red Sweater - S8-E2
Continuity mistake: When Ross is explaining about buying more cameras, the way he holds it changes. Follow the lens. (00:08:40)
The One Where Rachel Tells... - S8-E3
Continuity mistake: At the start when telling Chandler about Rachel, The guitar case is done up or undone depending on the shot. (00:01:20)
The One Where Rachel Tells... - S8-E3
Continuity mistake: After the opening credits, when Joey and Phoebe enter Joey's apartment, note the poster hanging on the wall and some items on top of the fridge, as well as a few of the magnets on the fridge, change, move, vanish, or suddenly appear in the following shots. Examples: the wall poster moves closer to the door; the Chunky B. Wear magnet at the side of the fridge moves to the freezer door; a takeout menu suddenly appears on the fridge door; the red star magnet vanishes; etc. (00:03:00)
The One Where Rachel Tells... - S8-E3
Continuity mistake: When Joey and Phoebe are talking about the towel incident, Joeys arm goes from bent to straight depending on the angle. (00:03:40)
The One Where Rachel Tells... - S8-E3
Continuity mistake: When the airline representative states the first class seats are gone, her head leans away from the camera. The shot changes and it's leaning to the camera. The camera is in the same place. (00:07:10)
The One Where Rachel Tells... - S8-E3
Continuity mistake: Joey hits the blue robots head down. The camera changes and the head is back up. (00:07:25)
The One Where Rachel Tells... - S8-E3
Continuity mistake: In the scene where Monica and Chandler are trying to get in the first class lounge, Monica has a green bag on her left shoulder. It switches mid-scene to her right hand, and then appears back on her left shoulder. (00:08:40)
The One Where Rachel Tells... - S8-E3
Continuity mistake: When Rachel and Ross are at his apartment, Rachel is holding some magazines. The way she holds them changes depending on the shot. (00:09:35)
The One Where Rachel Tells... - S8-E3
Continuity mistake: In the scene after Rachel has told Ross, she finishes the magazine and tells him there is no pressure on him, his hand is on his chin, then almost instantly his hand is down. (00:11:20)
The One Where Rachel Tells... - S8-E3
Continuity mistake: When Rachel says Ross can be involved as much as he likes, his arm moves from by his chin to in his lap when the camera cuts. (00:11:25)
The One Where Rachel Tells... - S8-E3
Continuity mistake: When Joey finds out condoms are only 97% effective, he has his arms crossed. The camera changes angle and he now has them by his side. (00:14:30)
The One Where Rachel Tells... - S8-E3
Continuity mistake: In the deleted scene on the DVDs Chandler is leaving the security interview with his holdall over his shoulder by the short strap. The camera cuts to outside the room and the holdall is now level with his legs. (Mistakes in Deleted scenes are valid if they are only in that scene which this is.) (00:24:50)
The One Where Rachel Tells... - S8-E3
Continuity mistake: In the deleted scene on the DVD, Chandler puts his plane tickets in his shirt pocket. Next shot the tickets have reversed. Look at the blue section. (Mistakes in deleted scenes are allowed if they are in that scene.) (00:25:00)
The One Where Rachel Tells... - S8-E3
Continuity mistake: While Joey's on the phone with Monica telling her the phony story that he and Phoebe smell gas coming from her apartment, on the table are the glass casserole dish and lid from the chicken parmigiana and a water bottle, but in the closeup there's only a ceramic blue bowl filled with eggplants and squash, and it keeps switching in the following shots,.
The One Where Rachel Tells... - S8-E3
Continuity mistake: When Rachel sits down in Ross' apartment, she places her magazine down on the table with its binder facing the audience, but while Ross goes on about their one night just being fun the binder is now facing the opposite way on the table, and then it's flipped back to the original position.
Answer: Usually by the seventh night of Hanukkah you don't know what to get the other person, and you will probably resort to getting the other person something insignificant. Chandler is basically saying that the pen is a stupid gift.