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Continuity mistake: When we get to Trelawney's class when she says "...discover if you possess the sight.", she gets up from her chair. While doing so she place both her arms on the arm rest, but when it cuts her left arm is up. (00:28:10)

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Continuity mistake: When Hermione removes the blanket that makes Potter invisible you can see some snowflakes on his shoulder. It cuts and she says "Harry, what happened?", then it cut again and the snowflakes are gone. They could not have melted that fast. (01:04:55)

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Continuity mistake: When Lupin is about to teach Potter the Patronus charm, you see Lupin walking with his hands in his pockets while saying "Do you have a memory? Allow it to fill you up. Lose yourself within it." When it cuts Lupin has his left hand up. (01:05:30)

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Continuity mistake: When one of the Weasley twins says, "Not flashing that clipping again." to Ron, we see Ron holding Scabbers. The way he holds Scabbers changes in the next shot. (00:16:20)

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Continuity mistake: When Potter comes down the stairs with his trunk, the strap on the trunk is bent backwards. When it cuts it lies normally on the trunk. (00:06:25)

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Continuity mistake: When Aunt Marge is about to fly out the door, we can see Uncle Vernon leaning on the table with his back against the door and the dog biting his left foot. When it cuts to Aunt Marge coming out the door, we see Uncle Vernon facing the door and the dog is biting his right foot. (00:05:10)

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Continuity mistake: When Dudley is hit by the first button that flies off Aunt Marge, we can see a table beside him with a lamp and a picture on it. When it cuts to Dudley lying on the floor, we can see the lamp and the picture have changed position. (00:04:50)

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Continuity mistake: When Aunt Marge says "Actually, it's nothing to do with the father..." you see Aunt Petunia lift her right arm. When it cuts her arm is down. (00:03:45)

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Continuity mistake: When Potter is leaning over the bed watching the 'Monster Book of Monsters' on the floor when it goes back under the bed, we can see the sheets on the edge are fine. When it cuts they are crinkled. (00:15:05)

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Continuity mistake: When Potter spots the dog at the bus stop he stumbles backwards and falls onto the pavement. Then we see the bus light come at him. When it cuts we see the bus come around the corner. How could the light be shining on him when the bus wasn't coming at him at all? (00:07:50)

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Continuity mistake: At the dinner table when Aunt Marge says "Vernon, do something" the cloth in front of her on the table is fine. When it cuts the cloth is crinkled. (00:04:30)

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Continuity mistake: When Snape points his wand at the Marauder Map and says, "Reveal your secrets," you can see Potter has his right hand down. When the scene cuts, his right hand is holding the map. (01:13:00)

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Continuity mistake: After Potter has opened the 'Monster Book of Monsters' he stumbles backwards and climbs onto the bed. When it cuts we see him climbing up again. (00:14:45)

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Continuity mistake: When Stan Shunpike says, "Take it away Ernie," we see Ernie having a bite of his toast. He then puts his hand with the toast down to put the bus in gear, but when the view cuts back the toast is suddenly gone. (00:09:20)

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Continuity mistake: When Potter goes onto the bus he has his arms down. When in cuts he has his right arm in his pocket. (00:08:45)

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Continuity mistake: Outside Hagrid's when Cornelius Fudge says, "...shall be executed this day at sundown." you see Harry, Hermione and Ron hide behind some pumpkins. You can also see a crow standing on a pumpkin right in front of them. When it cuts from behind them that crow is gone. (01:22:45)

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Continuity mistake: When Lupin and Potter enters the classroom after Lupin got the Marauders Map from Snape, Lupin says "But quite frankly, I am astounded that you didn't hand it in." The way he holds the map change in the next shot. (01:14:35)

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Continuity mistake: After Harry boards the Knight Bus, Stan hands him his ticket. In the shot facing Stan he folds the paper and holds it between his index and middle fingers. However, in the shot facing Harry, the paper is straight and he holds it between his thumb and index finger. (00:09:30)

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Continuity mistake: When Potter and Hermione is following back in time down to Hagrid's you see Hermione leaning against a column before putting her arm down. When it cuts back she is still leaning against the column. (01:45:25)

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Continuity mistake: When Harry says, "I said we'll take you to the castle," to Pettigrew, you see Sirius pointing his wand at Pettigrew. When it cuts Sirius is standing next to Harry, but he is no longer pointing his wand. (01:32:45)

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