The One Where Ross Is Fine - S10-E2
Audio problem: When Ross is drunk and talking to Rachel, Joey and Charlie on the couch in his apartment; he begins to say "Where do you think we can go?" but his mouth does not move. (00:12:10)
The One Where Ross Is Fine - S10-E2
Audio problem: When Phoebe and Frank Jr. are talking about giving one of the triplets away, Frank makes a very loud noise but his mouth doesn't move. Making a moan this loud requires you to open your mouth. (00:12:50)
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.