Spider-Man 3 (2007) - 148 mistakes

Continuity: During the Peter/Harry fight at the beginning of the film, when Peter retrieves the ring from the air and then falls onto a rooftop, if you watch closely the large air vent moves from being from Peter's right out of shot, and when the shot changes to him starting to run, the air vent is now much further behind him.

Continuity: At the very beginning of the film when we first see Peter, 4 kids stand beside him and watch Spider-man on the big screen. Watch closely when they walk away, the little girl walks off first followed by the 3 boys, yet in the following shot the girl is at the very back with the 3 boys leading the way.

Continuity: When Venom dies, from the front shot Peter takes his hand away from his face. From the immediate back shot he still has it placed there.

Continuity: When Peter is dancing with Gwen, a chubby guy behind is snapping his fingers or waving heartily. The following shots of his movements, couple frames later, show him in totally different positions.

Continuity: When the cop is about to climb on the truck, there's a grey car behind a yellow cab on the lane next to him. In the wide angle the grey car is nowhere to be seen.

Continuity: When JK is receiving a marketing lesson in his office, the amount of water in his glass increases between shots instead of decreasing.

Continuity: The first time we hear MJ's answering machine message, she says something along the lines of "Sing your song after the beep, 'beep'" then we hear the electronic beep. The second time it sounds exactly the same, so she hasn't re-recorded it, except this time her message cuts off before she makes the beeping sound.

Revealing: After Peter first encounters Eddie as the "Black" Spider-Man, Eddie takes out a second camera and begins taking photos. However if you look at the camera's flash - you'll see it's reflecting the flash from somewhere behind the camera - it's not generating them.