Continuity mistake: The Monster Book of Monsters' torn papers change amount/position in subsequent side and top shots when there has been no movement on the floor by the book or Harry nor any floor shaking by the train either. (00:15:20)
Continuity mistake: In Harry's room at the Leaky Cauldron, the rug and log holder's positions change. For instance, in the shot from under the bed, as Harry's head looks upside down at the Monster Book of Monsters, the rug in front of the fireplace is directly ahead. The right edge of the rug is aligned with the bed post on the wood floor. However, in the shot from the top of the bed the rug's position is now much farther to the right, use the wood planks as a guide. (00:15:25)
Continuity mistake: At the Leaky Cauldron, after Harry takes off his sneaker, to distract the Monster Book of Monsters, he stands at the edge of the bed. In the wide shot, the very long ends of the shoelace dangle over his fingers at his knuckles, yet, in the next close-up, it's now the short ends that are held tightly in his fist, the opposite way. (00:15:55)
Continuity mistake: When Harry and Ron are looking at the clipping from Egypt the clipping lies on the table. Its position changes in the shot when the Weasleys arrive. (00:16:15)
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)
Continuity mistake: While HRH sit in the Leaky Cauldron, as Ron says, "Even Scabbers enjoyed himself," and continues, "Yeah, along with the dung beetle," the stool behind Harry is straight and not under the small table at all. In the next shot as the twins get on Ron, the stool is crookedly pushed under the table. (00:16:40)
Continuity mistake: When the train suddenly stops, Harry gets up and slides the door open. He pulls the door with a tight grip on the doorhandle, then he releases his grip from the handle and rests his palm on the doorhandle. But in the next shot he is gripping the doorhandle again. (00:19:25)
Continuity mistake: When the kids are on the Hogwarts Express, there is a bottle of water on the flat fold up tray near Lupin. As the train is bumped, Ron is jerked forward, but the bottle remains in the same position. (00:20:40)
Continuity mistake: On the Hogwarts Express, Lupin pulls out his wand to repel the Dementor attacking Harry. In the shot facing Lupin his shirt sleeve is mostly covered by his suit sleeve and he holds the wand a particular way. In the next close-up facing the Dementor, Lupin's arm is visible and a much greater area of his shirt sleeve is now seen and he holds the wand completely differently. (00:22:15)
Continuity mistake: When Dumbledore first introduces Lupin as the new Defence Against the Dark Arts teacher, the camera pans to the Gryffindor table. You can see that Ron and Hermione are sitting opposite each other with their dinner sets in front of them. Then Malfoy insults Harry, then when it cuts to Ron saying "Shove off Malfoy" Ron is now sitting opposite the girl who was beside Hermione and not Hermione herself, and the girl couldn't have just moved across because all of her dinner set is in front of her too, perfectly set out. (00:24:05)
Continuity mistake: When Potter, Weasley and the other kids are making all the animal noises and Potter makes the steam come out of his ears, we see Potter put his arms down. When it cuts from the outside we see Potter has his right arm up. (00:27:15)
Continuity mistake: When Harry stands in front of the Gryffindor dorm and says the password, the door opens inwards. But when the shot changes to inside the dorm, there is no open door visible. (00:27:40)
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)
Continuity mistake: When Trelawney is looking in Neville's cup, a white cup is in front of a saucer on the table. When it cuts the cup has moved to the other side of the saucer. (00:28:55)
Continuity mistake: When Trelawney is done looking in Neville's cup and puts it down, you see Neville putting his hands on the table. When it cuts his hands aren't on the table. (00:28:55)
Continuity mistake: When Trelawney is walking towards the table that Potter, Ron and Hermione are sitting at, you can see the book on the table is closed. When Trelawney gasps it cuts to Ron and you can see the book is actually open. (00:29:00)
Continuity mistake: When the Whomping Willow kills the blue bird flying towards Hagrid's home, the loose branches from one shot are not visible in the second shot. (00:29:05)
Continuity mistake: When Trelawny says "Look at the cup, tell me what you see" to Ron, the way Ron holds the cup changes between shots. (00:29:10)
Continuity mistake: When Trelawney looks in Potter's cup she is frightened and throws the cup on the table. We can see it landing with its handle inwards on the table. When it cuts the handle points outwards on the table. (00:29:30)
Continuity mistake: 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. (00:30:00)
Chosen answer: Fred and George used the map to aid them in their mischievous activities at Hogwarts, and probably had little interest in what their little brother was doing or who he might be with at any given time.
raywest ★