Corrected entry: When Phoebe tells Monica and Chandler that Rachel and Joey are kissing in the next room, at the time she says "It's Rachel and Joey.", you can see that the door leading to their room has been partially cut to achieve the effect of the camera going through the wall. (00:01:40)
Corrected entry: The Spanish subtitles for this show are laughably bad. Across the first seven seasons, the subtitles routinely mistranslate what the actors are saying. In the worst cases, they omit whole sentences. Many times, they use words that don't exist in any Spanish dictionary.
Corrected entry: When Phoebe is considering carrying her brother's babies, her mother gives her a puppy to look after. Chandler seems very comfortable with this puppy. However, in Series 7, when Phoebe brings a dog back to Monica's apartment, Chandler says he is terrified of dogs - especially puppies.
Corrected entry: After Rachel tells Ross she is pregnant with his baby they go to see a midwife who performs an ultrasound scan. However, she never once touches Rachel with the equipment, yet when they look at the screen they are told "There's your baby," and they can see it moving and the heart beating etc.
Corrected entry: When the doctor is explaining to Phoebe about the triplets she says that "giving birth to three babies is not that different than giving birth to one". However, most triplets are born prematurely and by Caesarian section (which the doctor doesn't mention).
Corrected entry: The whole plot line of Rachel getting off the plane is most definitely impossible in post-9/11 America. Regulations consider any passengers that get off the plane after they've boarded to be security risks. When Phoebe gets Rachel talking about something wrong with the plane, causing panic, all those panicked passengers would have been stopped, and Rachel likely would have been questioned for the suspicious nature of that phone conversation. Likewise, when Rachel goes running off the plane, she at best would have been forcibly stopped and questioned, and at worst would have been shot, like the mentally ill guy in Miami in early 2006.
Corrected entry: When Phoebe is teaching Joey how to lie, look carefully at the plates on the table behind her. There are three plates, the next time you see them they all have napkins on them, then in the next shot (with the plates) only the one closest to the camera has a napkin on it. Also this plate is one of Monica's good plates, yet when Joey sits down later, it is a red plate.panda
Corrected entry: When Ross walks into Monica and Chandler's hotel room, he is packed much earlier than both Monica and Chandler. However, in the episode after Monica and Chandler get married, Ross only signs out of the hotel a few minutes before check-out time. This is also implied by other characters who say that he does that all the time.