Audio problem: During the scene with the "flying" letters Harry gets one letter and tries to go in his "room", but Uncle Vernon grabs him. When Harry says, "They're my letters," if you watch closely his lips don't move. (00:11:55)
Audio problem: When the troll is about to swing at Harry for the third time with his club, Ron levitates his club in mid-air. When the club falls, it hits the troll's head with a loud thunk, then falls to the ground. But you never hear any sound of the club hitting the ground. (01:08:44)
Audio problem: When Harry, Ron and Hermione are running away from Mrs. Norris (the cat), Harry yells, "Quick hide through that door!" and if you look close enough you can see that his mouth doesn't move when he says that. (01:01:45)
Audio problem: When Hedwig flies from Harry's arm, or owls deliver mail, you hear the sound of wingbeats. However, owl's feathers are specially adapted to allow for completely silent flight. See here for an explanation. http://www.owlpages.com/articles.php?section=Owl+Physiology&title=Feathers. (00:53:45)
Audio problem: When Dudley is complaining about the number of birthday presents he got, his mouth doesn't match with what Dudley is yelling. His line is badly dubbed. (00:05:00)
Audio problem: In the scene at the very end of the movie when Hermione and Harry are getting on the train, Hermione says, "Feels a bit strange going home, doesn't it?" Harry responds, "I'm not going home, not really." If you look closely, Harry says the words and his mouth moves. Then the camera changes angles and Harry mouths the same words once more, but no sound comes out. (02:23:15)
Audio problem: When the letters come flying out of the fireplace, Dudley yells, "Please, make it stop." If you look at his lips during this time, they're not moving. (00:11:25)
Audio problem: In Gringotts Bank in Diagon Alley as soon as it comes to the scene with the cart Harry and Hagrid are sitting in with the goblin, when they stop and the goblin says "vault 687" if you look close enough, you can see that his mouth isn't actually moving at all. (00:23:10)
Audio problem: Amidst the flying letters, as Vernon begins to chase Harry, when he yells, "Give me that!" and continues with, "Give me that letter!" his lips do not move when visible on screen. (00:11:40)
Chosen answer: There are several reasons. First, the position is cursed, so there is little reason to give Snape the job when he will not last any longer than all the previous instructors. If Snape did become the DADA instructor, something could happen to him that could result in his being harmed, having to leave Hogwarts, or be otherwise incapacitated in some way; that would render him useless to Dumbledore as a double agent. Also, Dumbledore trusts Snape, but putting him in an environment where he is teaching about dark magic on a daily basis would be too tempting and emotionally compromising to someone who had been so easily seduced by the dark side. He could possibly relapse. It would be like having a recovering alcoholic work as a bartender. Of course, he does eventually become the DADA instructor, and lasted no longer than his predecessors.
raywest ★
In the movies it is never mentioned that DADA role was cursed by Voldemort.
This is true; though it doesn't say it's not either. With trying to fit 7 long books and years worth of pages of HP information in 2 and a half hours; as long as the movie doesn't say it's not cursed, with our knowledge, there is no problem with reporting that it is. Even directors of non-book movies do this all the time; leave background information out that helps explain things they just didn't have time so they explained it behind the scenes.