The One With Phoebe's Rats - S9-E12
Continuity mistake: In the one with Phoebe's rat babies, it is very obvious that the box has nothing in it. Also when she is in her apartment explaining about giving up the triplets she had for her brother she puts the box down on the table, yet when it cuts to Mike's face and Phoebe's realisation that she hadn't told him that before, the box is back on her lap. (00:14:05)
The One With Phoebe's Rats - S9-E12
Continuity mistake: At Rachel's birthday party, Phoebe reaches into the shoebox of rats, but straight away in the next shot, her hands are on the lid. (00:14:10)
The One With Phoebe's Rats - S9-E12
Continuity mistake: Phoebe is sitting on her couch talking with Mike near the end of the episode. She puts the box with the rats on the coffee table and in the next shot, she is holding the box again. (00:18:35)
The One With Phoebe's Rats - S9-E12
Continuity mistake: In the series nine episode with the 'hot' nanny, at the end when Rachel is on the veranda/balcony thing with Gavin, before he says 'I do have feelings for you', the shot is over the shoulder and he has his hand on the wall of the balcony, when the shot switches to the front angle his hand is by his side. (00:20:55)
The One Where Monica Sings - S9-E13
Continuity mistake: When Phoebe, Monica and Rachel are talking in the coffee house, a waitress walks by and in the next shot when the camera focuses on Monica, and comes back to Rachel, the waitress walks by again. (00:05:00)
The One Where Monica Sings - S9-E13
Revealing mistake: When Joey has his eyebrows plucked at the salon, it is obvious that the woman is not pulling any hair off. (00:07:00)
The One Where Monica Sings - S9-E13
Visible crew/equipment: When Gavin goes to the door to bring Rachel soup you can see a camera man's microphone in the top of the screen. (00:10:50)
The One Where Monica Sings - S9-E13
Continuity mistake: When Rachel is talking to Gavin at Ross', her position when she's sitting changes depending on the angle. (00:14:20)
The One Where Monica Sings - S9-E13
Visible crew/equipment: After Joey dips his finger into the hot wax and smears it all over his hands, when Sonya walks out of the back room we can see her tape mark on the floor, which she promptly steps on.
The One With The Blind Dates - S9-E14
Visible crew/equipment: At the start in the coffee shop there are some stage lights visible in the coffee pot behind Joey. (00:00:05)
The One With The Blind Dates - S9-E14
Continuity mistake: When Ross walks in to Joeys apartment and says "Hey you're not naked", the Magna Doodle pen is in the holder, yet when Rachel leaves it is hanging. (00:00:25)
The One With The Blind Dates - S9-E14
Continuity mistake: When Phoebe and Joey are eating the baby food, Phoebe says 'Maybe once they start dating and see what's out there..." she puts the spoon in her mouth. Then when the shot changes to show Joey, her spoon is back in the jar. (00:03:25)
The One With The Blind Dates - S9-E14
Visible crew/equipment: When Phoebe meets Joey to tell him about the date for Rach, the stage lights are seen outside the coffee-shop. (00:05:35)
The One With The Blind Dates - S9-E14
Continuity mistake: When Phoebe says that they should not tell Ross that the date is cancelled so that he gets stood up, Joey says, "I hear that's bad" - implying that he has never been stood up so doesn't know how it feels. However, in TOW Two Parts (Part II), Ursula stands Joey up, and he takes it pretty bad. (00:06:40)
The One With The Blind Dates - S9-E14
Continuity mistake: When Phoebe and Joey are at the coffee house discussing their plan to ruin Ross' blind date just before Joey says, "Ooh I hear that's bad" the pendant on Phoebe's necklace is smooth and blue. When the camera pans to Phoebe after Joey says his line the pendant is flipped over and reveals a new design. This continues to happen throughout the scene. (00:07:20)
The One With The Blind Dates - S9-E14
Factual error: Monica takes an ovulation test to see if she is still ovulating. The ovulation test only works before you ovulate (usually 24 to 36 hrs), to detect the LH surge that comes before you ovulate. Once you ovulate that surge is gone and the test will not work. (00:08:20)
The One With The Blind Dates - S9-E14
Continuity mistake: When Rachel is at her blind date, and Steve tells her that he's selling T-Shirts now, Rachel's arms are on the table, but then the camera cuts to her, and she has her arms crossed. (00:12:00)
The One With The Blind Dates - S9-E14
Continuity mistake: At the end of the blind date, in shots of Rachel, her date Steve is holding her hand with both of his, but from the reverse angle he's only using one. (00:18:45)
The One With The Blind Dates - S9-E14
Continuity mistake: When Ross and Rachel are at the coffee shop after their dates, Rachel's necklace disappears and reappears twice. (00:20:20)
The One With The Mugging - S9-E15
Continuity mistake: At the beginning when Joey is in Monica's apartment eating bacon, you see Joey reach for the bacon from the front, then in the next shot (side on) you see Joey reach for the bacon again. (00:02:10)
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.