Continuity mistake: After Rey hits the sand worm with her staff, it rears up out of the sand and spits BB-8. Between shots of it coming up and then switching to a side view, suddenly BB-8's model is flipped like a mirror. Notably, the black marking on his underside is flipped, his eye and antenna are flipped around, and the blue slime on him is mirrored. (00:01:50)
Other mistake: When the sand worms pit out BB-8 and the staff is tossed, BB-8 does not cast a shadow under him, while Rey's staff does have a shadow. (00:01:51)
Continuity mistake: In the animation of Rey throwing her staff at the sand worm, her hand changes from being palm and fingers towards the camera to the back of her hand facing the camera in a single frame while holding the staff in the animation of throwing it. (00:01:47)
Continuity mistake: In the shot where Rey throws her staff and it lands hitting the sandworm, the large sand dune that was to her left has disappeared when it was there a couple of shots before. And she did not turn her body, only her head looking around. (00:01:43)
Continuity mistake: After the sand worm spits out BB-8, he has lots of blue slime on various parts of his mechanical body and eye. Moments later, when Rey catches him, the amount of slime on his eye is less and not as thick; several spots of blue slime have moved around or vanished, and some are different sizes. (00:01:58)
Continuity mistake: When the sand worm spits out BB-8 and launches Rey's staff, both BB-8 and the staff go flying towards the downed AT-AT walker. They start to separate in the air, with BB-8 flying further and faster than Rey's staff. Yet in the next shot, suddenly they are together in the air again. (00:01:50)
Continuity mistake: After the sand worm drags BB-8 down under the sand, Rey runs up to the hole left behind. A couple of shots later, when she's looking around, still standing in the same spot, the hole and sand mound that she was next to have vanished. (00:01:43)
Continuity mistake: Rey throws her staff at the sand worm's location to free BB-8. When she does, her robe has a large loop of cloth hanging down behind her leg. Then, in the next shot after she throws the staff, suddenly that extra cloth loop is missing. (00:01:47)
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)
Other mistake: After the sand worm grabs BB-8 and pulls him under, Rey runs up to the hole. Yet in this shot, it shows her running up beside and then past the hole. When in the next shot, she's shown stopping right at the hole to look down into it. (00:01:34)
Continuity mistake: When the worm rears up in front of Rey, there are horizontal lines on its underbelly. One of which is very near the jaw and intersecting with the "shoulder" of one of its little arms. In the shot where it's about to snap at Rey before she wedges her staff into its mouth, the topmost line has vanished. (00:01:06)
Continuity mistake: Just before the worm bursts up from the sand in front of Rey, BB-8 is running away and then stops looking forward. In the shot with him alone, the yellow rectangle next to the heart shape on his face is lined up so the edge of it is almost right above the left edge of one of the orange rectangles under it, with the white above the orange fully. Then, in the shot with him and Rey together facing the worm, the orange rectangle has moved further away so the right edge of it lines up with the white one, with more space between the two orange rectangles closest to his face. (00:01:00)
Continuity mistake: Just before Rey jams her staff into the worm's mouth, she pulls back with her elbows out. In the next shot, suddenly her arms are in a completely different position with both elbows down. (00:01:07)
Continuity mistake: After Ray tells BB-8 to not move, we get a shot of them standing together. Suddenly, an extra line has now appeared on the heart-shaped part of BB-8's face going out from his eye. (00:00:39)
Other mistake: Ray and BB-8 take off running away from the nightstalker worm. Despite rolling very fast and leaving behind a trail in the sand, BB-8 doesn't kick up any sand into the air behind him at all, despite being a ball rolling in the sand. (00:00:48)
Other mistake: Never once does Rey leave any footprints in the sand, despite her being heavier than BB-8. And BB-8 leaves constant trails in the sand wherever he goes. BB-8 weighs approximately 40 pounds, with Ray, if going by Daisy Ridley's reported weight, is about 121 pounds. She would absolutely be leaving foot prints in the sand, especially when jumping around. (00:00:22 - 00:02:44)
Continuity mistake: As Rey tells BB-8 that he can stay with her, you see the droid behind her from a frontal view. When it cuts to a side angle of BB-8, the lines and details on the side of it's head close to it's "eye" change with more lines appearing, the orange rectangles at the bottom become taller, and the white rectangle box moves higher up. Also in the side view there is some black cone sticking out of what would be BB-8's "face." If it's his eye it's now suddenly sticking out way too far and isn't that extended. If it's the little censor thing that is next to his eye then it's now on the wrong side of his head. (00:00:25)
Continuity mistake: The piece of junk that Rey feeds to the Nightwatcher worm appears between her and BB-8 with the pointed end of it facing away from BB-8 towards Rey, with the round end pointed out. When she bends down to pick the junk up, in the close up the pointed end is now facing outwards from between her and the droid with the round end towards BB-8. (00:02:10)
Continuity mistake: Rey grabs BB-8 and her staff, and then jumps up onto a fallen AT-AT Walker. She turns to look at the Nightwatcher worm and is standing right next to a very slime covered BB-8 on top of the AT-AT with her hand on his head. It cuts to a shot of the Nightwatcher from over Rey's shoulder and then back to a frontal view of her again from a higher angle. Rey didn't move once during those shots. But now she's suddenly standing further away from BB-8 to show the junk part between them, BB-8 now has much less slime on him, and the groove in the metal of the walker going down vertically behind BB-8 has vanished. (00:02:05)
Continuity mistake: As Rey is retrieving her staff with a slimed BB-8 in her grasp, she passes by and leaps onto the leg of an old fallen AT-AT Walker which is next to her. There is a fin, or toe, sticking up into the air from its foot with a groove down the middle in the close shot as she gets her staff. In one of the following shots as she's jumping up onto the leg, that middle groove on the toe disappears. Also in these shots, suddenly much more sand is built up against the foot of the Walker than before. (00:02:00)
