10 Most Annoying Mistakes You Never Noticed In Friends

10. Monica's Apartment Changing Numbers

It's the little details in Friends that keep fans feeling close to it, like noticing a character's unique wardrobe or spotting things in their homes. That's what makes this mistake so frustrating, as it's right there for all to see.

During the first season, the writers noticed that it made no sense for Monica's apartment to be number 5, seeing as she's on an upper-level floor and doesn't have the kind of money to reserve a whole block to herself. Thus, her number was changed from 5 to 20. Chandler and Joey's was also moved from 4 to 19.

Was this change ever addressed on the show? Of course not. The writers simply replaced the number and went on their merry way without ever bringing it up in dialogue.

Ironically, the high-rise apartment being such a low number would have probably been on this list had it not been changed, so it was a fair enough decision to make. But damn, did they really expect viewers not to notice and just accept it as if nothing happened? This is New York, not the halls of Hogwarts; buildings don't just change all willy nilly.