Continuity mistake: When Rey jams her staff into the sand worm's mouth, she and BB-8 turn around and run back the direction they came from. With that first shot showing a second trail in the sand, BB-8 is leaving next to the trail he made already. Two trails. Then, when the sand worm slams down to spit Rey's staff back at her, that shot shows BB-8 and her still running the direction they came from, but now there's only one trail behind BB-8, the new one he's leaving now. The old one has vanished. (00:01:14)
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