It seems no matter how much time goes by, Friends fans just can't seem to get enough of the iconic 90s sitcom with many still binge-watching it on Netflix today.
But as they take another look back at some of their favourite episodes, people have been noticing funny little continuity errors and filming mistakes that they hadn't previously picked up on.
For instance, we recently learned about a major mistake in the show's pilot episode which saw Phoebe's character talking to Rachel while standing behind the sofa, near the kitchen. However, in the next shot Phoebe is sitting on a chair on the other side of the room drinking coffee.
And now eagle-eyed viewers have picked up on another blunder, but this time it involves Monica.
In the Season 4 episode, The One With the Embryos, Monica and Rachel take on Joey and Chandler in a game to see which team knows the other one better.
The grand prize ends up becoming the girls' apartment and whoever wins, gets to live there.
It ends with Chandler and Joey being victorious, and the guys swapping apartments.
However, a Reddit user realised upon re-watching that Courteney Cox, who plays Monica, seemingly messed up one of her lines after the game.
Writing on the How You Doin forum, the fan said: "I can't believe I never noticed this before, it's my favourite episode, I've seen it so many times!
"Just after the guys win the trivia game when Rachel is refusing to move, Monica says 'if we had lost, we would have made them get rid of the birds, right?;
"It doesn't make sense. They did lose. She was probably supposed to say 'if they had lost' or 'if we had won', right?"
And they weren't the only ones baffled by this error.
One fellow fan said: "I had to stop what I was doing immediately and go check. Yup, both the actual dialogue spoken by Monica and the subtitles say 'if we had lost'. I can't believe the editors didn't catch it!"
Another replied: "I had to rewind it five or six times just to check I wasn't going crazy!"
While a third, who also hadn't caught it before, added: "Damn, you're sharp."
Did you notice this? Let us know in the comments below.
