Goofs : Harry Potter and the Sorcerer's Stone
Revealing mistakes: The mechanism which makes the Quidditch box shake can be seen underneath the box when Wood falls over after catching the Bludger.
Miscellaneous: As the three children run across the field to Hagrid's hut, Harry says a few lines ending with "... why didn't I see it before?" Hermione is mouthing Harry's lines with him.
Factual errors: The snake that Harry talks to blinks. Snakes don't have eyelids, making it impossible for them to blink. It is repeatedly pointed out that snakes can't talk, either, but in the context of the movie, this is acceptable, while the snake's blink is a simple mistake.
Crew or equipment visible: When Harry, Ron, and Hermione are struggling in the Devil's Snare, a puppeteer can be seen on the left of the screen, working at least some of the masses of tendrils.
Continuity: During the train journey, Ron's hair is parted in several different places.
Continuity: Harry's glasses sometimes have lenses, and sometimes don't, as do Dumbledore's.
Continuity: On the train, the same hill as well as lake (as seen by the waves in the middle of the water) are seen multiple times.
Audio/visual unsynchronized: Harry, Dudley, and Uncle Vernon during the flying letters sequence.
Revealing mistakes: When Uncle Vernon is ripping up the letters that come through the mail slot, you can see that the envelopes had already been cut, making it easier for him to rip up.
Crew or equipment visible: When Harry is in Ollivander's, after he goes up to Hagrid standing outside of the shop with Hedwig, you can clearly see the reflection of a camera in the window.
Audio/visual unsynchronized: When Harry is going home on the Hogwarts Express he says "I'm not going home, not really". The next view of the camera shows that Harry is still saying "not really" but you can't hear the words
Continuity: When Harry, Ron and Hermione are talking to Hagrid about Fluffy, Ron's scarf goes from being on his shoulder to being draped over his shoulder.
Revealing mistakes: At Halloween, Dumbledore announces for the teachers to follow him to the dungeon to find the troll. The next shot is of McGonagall and in front of her you can see the strings holding up the "floating" candles.
Miscellaneous: When Harry receives countless acceptance letters from Hogwarts, he fights with Uncle Vernon, saying the dialogue "They're my letters! Give it to me!" Harry's voice is far deeper than the Harry in the rest of the movie, indicating this line was re-dubbed long after main production when Daniel Radcliffe's voice had already begun to change.
Miscellaneous: When Harry receives his first letter, Uncle Vernon says "Your letter? Who would be writing to you?", Dudley is standing next to him and is seen mouthing Uncle Vernon's lines.
Continuity: When Hermione runs across the field her bag switches arms.
Revealing mistakes: When Dumbledore is awarding Neville 10 points, you can see the plastic used to make Neville's ears stick out when he turns toward Harry.
Continuity: When Harry wakes up in the beginning of the movie his shirt is tucked in the back of is trousers. In the next shot it is not.
Revealing mistakes: In the scene with the flying keys, we can see the string holding up the broomstick just before Harry grabs it.
Continuity: When Harry goes looking for a book on Nicolas Flamel in the restricted section he opens up the screaming book to the first page. When the book starts to scream he is in the middle of the book.
Crew or equipment visible: When Harry, Ron, and Hermione just left Fluffy for the first time and walk into their dorm area, we see, under the painting, the feet of someone closing the painting.
Continuity: The note that Hagrid gives to the teller in the bank is wrinkled in one shot, neat and clean in the next, and then back to wrinkled.
Continuity: When Hagrid's cabin is shown the windows are so high up that even Hagrid can't see through them while standing on the ground. Later in the film, when Draco Malfoy spies on Hagrid through the window, the window appears to be at his eye level, and he turns and runs away, revealing that he wasn't standing on anything to make him tall enough to reach the window.
Continuity: In Diagon Alley, Harry and Hagrid walk past the same cart and storefront three times. In the opening wide shot, they walk past the purple storefront with the yellow moving scissors and the cart of market goods in front of it. Three shots later, the storefront and cart are shown again in detail, as Harry and Hagrid pass. The next shot shows them passing the cart (with a stack of cauldrons in the background). Several shots later, after passing the store with the owls, they are seen once again passing the cart with the same stack of cauldrons in the background.
Continuity: Just after passing Madam Malkin's shop and before the owl emporium in Diagon Alley, a woman dressed all in black and a man with a burgandy top hat and mutton chops pass on Harry's right walking in the opposite direction. In the next shot, as Harry looks to his left, the same pair can be seen standing and chatting in the doorway of the owl emporium.
Continuity: In Diagon Alley, Harry and Hagrid pass many groups of people multiple times, though they appear to be walking continuously in one direction. Watch for the wizard with curly red hair, the man with a top hat and mutton chops, and the group of three girls who cross in the foreground of the opening shot.
Continuity: When Ron gets drooled on by Fluffy and gets wet, but two shots later he's completely dry.
Errors in geography: When Harry arrives at Hogwarts, Professor McGonagall announces that the Sorting Ceremony will begin "momentarily". In UK English, momentarily means "for a moment" (i.e. briefly), and a Scottish witch as pedantic and precise as McGonagall would never use the American meaning of the word ("in a moment" or "soon"), even though the American meaning might be well understood. Then again, given that the otherwise equally pedantic Snape says "less" when he means "fewer", it could just be that the teaching staff's use of English is just as sloppy as it is in schools all over the muggle world.
Continuity: When the first years climb the stairs and meet Professor McGonagall for the first time, Ron's robe is hanging partly open in one shot, but is closed in the next.
Audio/visual unsynchronized: When Harry and Ron are fighting the troll in the girl's toilet, they use a spell to lift the troll's club over its head and drop it. The club does hit the troll and makes an appropriate sound effect, but then the club falls to the floor, it makes no sound at all.
Incorrectly regarded as goofs: Many viewers believe that the infant Harry in the flashback is wearing anachronistic Blue's Clues pajamas. The design on the sleeve is actually a rabbit.
Crew or equipment visible: During the chess scene, the shadow of a figure can be seen covering a light shining on the chess board near the bottom of the screen.
Continuity: When Harry, wearing his cloak of invisibility, spies on Professor Quirrell being bullied by Professor Snape, the shots filmed from Harry's point of view have him at eye level with the adults even though he is clearly shorter than they are.
Continuity: In the scene in the hut on the rock, where Hagrid comes to fetch Harry, Harry's T-shirt is hanging off his left shoulder at the beginning of the scene, however, for the rest of the scene, it is covering both his shoulders.
Audio/visual unsynchronized: In the scene following the defeat of the troll, Quirrel is shown speaking with the other professors, at which point they, and the trio, leave the girls' bathroom. Their footsteps are clearly heard as they move down the hall; however, in the next shot of the troll laying on the floor, the sound effects have ceased. In the last shot, of Quirrell jumping nervously in response to the troll grunting, the footsteps can again be heard.
Crew or equipment visible: At the zoo, as Harry is talking to the snake, just before Dudley rushes over, you can see the reflection of a cameraman and camera just above the snake.
Continuity: When Mr. Dursley is talking about how there's no post on Sundays and the first letter shoots out of the fireplace, the log poker is in the middle of the hearth, when all the other letters come shooting out, the poker is on the right side.
Miscellaneous: When Filch enters the Restricted Section of the library in search of the disturbance, he passes Harry, who's hiding under the Invisibility Cloak. The camera angle leads the viewer to believe Harry is as tall or taller than Filch. Harry should be a foot or two shorter.
Continuity: When confronted by the Troll, Hermione runs into the first bathroom stall. When the Troll attacks the stalls Hermione is in the 4th stall.
Continuity: When the troll attacks Hermione the first time, its club demolishes the first three stalls. Right before the troll swings its club again, the door of the second stall is still standing.
Plot holes: Quirrell's body begins to disintegrate as soon as Harry touched him. However, if this was the case, why was Quirrell able to choke Harry and remain intact?
Factual errors: According to the book, Hogwarts students reach the train by going through platform no. 9¾, which is secretly located in the barrier between platforms 9 and 10. In reality, platforms 9 and 10 are in separate buildings, and there is no barrier between them, but railway tracks. People wrote to Rowling about this, and she admitted getting confused between King's Cross and Euston stations.
Miscellaneous: When Hermione uses the spell "Alohomora" to open the door to the room in which Fluffy is locked up, she uses her left hand, but a few scenes later, in the Charms lesson, the shot clearly shows her using her right hand to perform the spell "Wingardium Leviosa".
Continuity: During the first meeting of Harry, Ron and Hermione on the Hogwarts Express, Hermione's tie changes from being crooked to one side, to straight then back to crooked again
Continuity: When Harry is trying to come out of his cupboard and Dudley shoves him back in, Harry emerges rubbing his head as if the door had hit him, but he was too far away by the time Dudley had slammed the door for it to be anywhere near his head.
Miscellaneous: During the flying lesson Madam Hooch tells them all to kick off from the ground on her whistle. However, Neville is the only one who does.
Revealing mistakes: When Harry and Hagrid are in the Bank at Diagon Alley. Hagrid gives the goblin a card. Multiple time through camera shots the cards corners have been bent and smoothed.
Crew or equipment visible: When Harry takes Ron to the Mirror of Erised, when Harry drops his cloak and runs away, you can clearly see the lime green from the outside.
Continuity: Dudley eats Harry's birthday cake with his hands, but when he turns around, after Hagrid has given him a pig tail, there is no cake or icing on his hands or face.
Miscellaneous: When Harry, Ron, and Hermione are walking up the stairs and the stairs are changing, you can still see the banister wobbling back and forth even after they've reached their final position.
Factual errors: During the chess scene, the bishop moves in a straight, rather than diagonal line as he attacks the bishop.
Miscellaneous: During the chess scene when the chess pieces and being destroyed the bits of rubble can be seen flying in opposite directions and sometimes even just a split second before the actual piece is destroyed.
Crew or equipment visible: At Kings Cross the camera crew is reflected on the side of the train on the right.
