The Fresh Prince Project - S1-E1
Revealing mistake: When Will staples his Malcom X poster to the wall, the wall bends back and forth for a second or two.
The Suicide - S3-E15
Revealing mistake: In this episode when Jerry leaves his room to talk to his neighbour about their fight, when he shuts his door the wall shakes revealing that the place he lives in is not a real apartment.
Revealing mistake: A minute or so after the health and fitness instructer dies, we see her lying flat out on her back. If you look carefully, you can see her chest moving up and down and breathing despite being dead. (00:13:05)
Suggested correction: If you actually watch the whole episode you will find she didn't die at all.
Talking rubbish I think, she did die. Maybe you're confusing her with the old lady who fainted?
At what point in the show did they reveal the instructor didn't die? It was the old lady who had just fainted.
I'm a big fan of this comedy and have probably watched each episode 20 times! I struggle to recall any mention of the fitness instructor not being dead.
The Father Christmas Suit - S2-E11
Revealing mistake: When Elizabeth is driving Richard's car to the church dressed in the father Christmas outfit with Hyacinth you can see that the handbrake light is on while the car is supposedly being driven.
Revealing mistake: When Leland Palmer is locked in the cell he starts screaming and runs headlong into one wall, then the other. The first wall wobbles noticeably on impact, indicating it is being shot on a set.
Somewhere in the World It's Christmas - S4-E15
Revealing mistake: At the end of the episode in the Peach Pit, Nat and the gang are all singing Christmas songs while Nat is playing some of the songs on a keyboard. It is very easy to tell by looking at his hands, Nat is simply miming on the keyboard.
Revealing mistake: When Briscoe and Green investigate the auto yard with the stolen, blue SUV, Briscoe handcuffs the owner. When he cuffs him, he turns him, showing his back and his hands behind his back. You can see the actor isn't cuffed, just holding the handcuffs as he walks. (00:06:35)
Return to Nantucket: Part 2 - S1-E4
Revealing mistake: Carol closes her eyes before Helen throws the pie in her face. There was no way she could have known it was coming because Helen was hiding the pie.
Revealing mistake: When people start running, they briefly appear standing 30 centimetres above the road.
Dawn and the Haunted House - S1-E2
Revealing mistake: Stacey can be heard whispering instructions to the kids she and Dawn are watching.