There are some ten (10) twilight mistakes seen and noted by some sharp-eyed, keen-eyed people,or just mere big Twilight movie addict who had watched the film a zillion times (probably). Check them in moviemistakes.com. Here are some of the mistakes:
In the scene where Bella is in the hospital, when the camera is up close to her face, the breathing tubes are right by her eyes, but when the shot is far from her face, the tubes are sitting on her cheeks.
When Bella and Edward talk in the woods, Bella drops her backpack in front of a tree. In a subsequent shot, the backback has disappeared.
When Bella pulls up in her truck for her first day at Forks High, as the camera pans from her truck as she parks it into shot, you can see the camera and boom reflected in the triangular window.
When Bella enters biology and Edward has finally returned, as she walks over to her desk the large book sitting on the edge repositions itself from sitting horizontally to vertically between shots. The bit of paper above it also moves closer to the edge.
After Edward saves Bella from being crushed by the van, while he is holding her, Bella's hair is outside of her jacket covering up her hood. When the shot changes her hair is tucked beneath the jacket and the hood is visible. When the shot changes back, her hair is covering up her hood.
I'd like to think that this is because Twilight was made as an indie film. Or just that Edward probably has something to do with some of those stuff. hahaha