Can you believe that MovieMistakes.com has already found mistakes from the third Harry Potter fim? I can't! They must really look hard, or they have seen the movie a ton of times already.
Click here to see what mistakes they found
The following are some mistakes they found:
1. The wings of the hippogriff are much shorter when folded up then when flying. According the animators, the wings would have to be huge to the carry the weight of the hippogriff when flying, but so big that they would drag on the ground when folded up. So they deliberately made the wings shorter.
2. Before Hagrid's lesson, during the scene where Draco Malfoy and his friends are teasing Harry about the Dementors, Draco pulls his hood/hat onto his head, but it doesn't have a good grasp and starts to slip off; the front of his hair is visible. A split second later from a different camera, the hood is snug on his head and no hair can be seen.
3. In the first Divination scene, Prof. Trewlaney reads Neville's cup then puts it down onto a saucer. However, in the next shot, Neville picks it up from the tabletop.
4. Draco Malfoy starts eating an apple during Hagrid's lesson about Hippogriffs. During the lecture, his apple changes back and forth from having a few bites taken out to being whole again. Draco himself also moves in the background from shot to shot.