Continuity mistake: Between the shots of Marge floating out of the house and later when Petunia runs to Vernon on the grass, there are many significant changes. The short brick walls that edge the Dursley garden are actually different bricks, different grout and are even aligned differently between these shots. The bushes along the wood fence are at least 2-3 ft away from the corner bricks in the first shots, but in the last shot are aligned with the corner. The height of those bushes go from being way above the top of the wood fence to being at least a foot below. In the first shots there are small metal plaques that are attached along the top of the wood fence, but in the last shot they are gone.
Picture added by Super Grover
To submit a picture, just click the edit icon under the relevant entry, then choose 'add a picture'. Thanks!
All images remain the copyright of their original owners - these low resolution images are simply individual frames used to demonstrate the entry.