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Continuity mistake: After the Yule Ball, when Neville walks into the dormitory, his shoes hang round his neck by their laces. While he says, "You alright Harry?" in Neville's first close-up his black collar lies flat, the shoes' laces hang round his white shirt and the heels touch. In the second shot his black collar is flipped up around his neck, the shoes' laces hang round the black collar and heels are about four inches apart. Then, in the third shot it reverts back, as in the first shot.