Continuity mistake: When Rachel spits out the champagne for the first time, her necklace is center chest. When the camera cuts it is far right. (00:13:25)
The One With The Halloween Party - S8-E6
Continuity mistake: The amount of carrot Chandler has keeps changing from less to more. (00:10:35)
The One Where Rachel Tells... - S8-E3
Continuity mistake: In the scene after Rachel has told Ross, she finishes the magazine and tells him there is no pressure on him, his hand is on his chin, then almost instantly his hand is down. (00:11:20)
The One Where Rachel is Late - S8-E22
Plot hole: The times in this episode vary a lot. Monica and Phoebe first bet about Rachel giving birth, then it goes to the scene with Joey and Chandler at the movies. It then returns to Monica and Phoebe the next day with Monica losing the bet. However, a little while later, it goes back a day and shows Joey and Chandler at the movie premiere again. (00:09:00)
Continuity mistake: When Ross says , "Yes, I am." after Mona calls him sweet, His hands are by his side. Next shot one of them is by his chest. (00:16:30)
The One Where Joey Dates Rachel - S8-E12
Continuity mistake: At the end Ross rips the map but in the next shot it's repaired. (00:21:00)
The One Where Rachel Tells... - S8-E3
Continuity mistake: In the scene where Monica and Chandler are trying to get in the first class lounge, Monica has a green bag on her left shoulder. It switches mid-scene to her right hand, and then appears back on her left shoulder. (00:08:40)
The One Where Joey Dates Rachel - S8-E12
Continuity mistake: When Phoebe flips out after losing the game and starts her cursing rant, Ross and Ben came in by opening the front door, but in all of Phoebe's closeups the front door is closed behind her.
The One With Rachel's Date - S8-E5
Continuity mistake: While Phoebe's in the kitchen with Monica and she's introduced to Tim the sous chef, the glass jar labeled "Monica's jar" suddenly appears on the shelf near the door, and it continues to vanish and reappear.
The One With Ross' Step Forward - S8-E11
Continuity mistake: It's obviously December, with the set decorations and Rachel's reference to sitting on multiple Santas' laps because she is randy from her pregnancy hormones. The characters establish that it's Rachel's fourth month of pregnancy...but she became pregnant about six weeks before Monica and Chandler's May 15 wedding. Her fourth month would have been in July, not December.
The One With The Rumor - S8-E9
Continuity mistake: When Will is demanding yams, it shows Ross looking towards the door; the camera then cuts to Will, and Ross is now looking at Will without time to move his head. (00:11:55)
The One Where Joey Dates Rachel - S8-E12
Visible crew/equipment: In the scene of the classroom, before Ross faints, he says, "Why don't you all" and above his head near the clock, there is a boom mic. (00:18:50)
The One With The Video Tape - S8-E4
Continuity mistake: When Chandler and Monica are trying to call Greg and Jennie, the water bottles on the table move around. Phoebe and Joey didn't move them, they are drinking from the cans. (00:05:30)
The One With The Video Tape - S8-E4
Continuity mistake: As Rachel goes to put the video on, Ross hangs his head. The camera cuts and now it isn't hanging. There was no time to move it between camera cut. (00:16:10)
The One Where Rachel Has a Baby, part 2 - S8-E24
Revealing mistake: When Rachel's baby is born, she is held up for Rachel and Ross to see, and she has no umbilical cord. There is no way the cord could have been cut that quickly. (00:34:15)
The One With The Secret Closet - S8-E14
Continuity mistake: In the scene where Rachel comes in to have Joey feel her stomach, he gets up from the bed and you can see the boxer shorts he is wearing. You can also see them at the end of the scene, even though he is supposed to be naked. (00:03:00)
The One With The Stripper - S8-E8
Continuity mistake: When Phoebe is trying to place the stripper at the beginning, her coffee cup on the table keeps changing position. (00:00:50)
The One Where Chandler Takes a Bath - S8-E13
Continuity mistake: When Joey is talking to Chandler about London, Chandler's wedding ring keeps disappearing and reappearing. (00:03:10)
The One Where Rachel Tells... - S8-E3
Continuity mistake: When Joey and Phoebe are talking about the towel incident, Joeys arm goes from bent to straight depending on the angle. (00:03:40)
The One With The Birthing Video - S8-E15
Continuity mistake: When Chandler tells Monica and Rachel to look up and see the baby as it is being born, Monica takes her hands off her face twice and Rachel changes to the same position twice. (00:17:00)
Answer: The statements that she's contradicting (that it is common, it happens to every guy, and it's not a big deal), are the things that a woman commonly says to a man who is suffering from erectile difficulty, typically to assuage his bruised ego. However, most men do not believe that these statements are true, as evidenced by Chandler's outburst. He's so caught up in the proof that women are lying about it that he gives himself away.
Rooster of Doom