Continuity mistake: In the shot of the alien's tail wrapping around the back of Lambert's legs right before it kills her, the floor is different to what it was before, there is water suddenly falling from the ceiling when there wasn't before and her trousers have changed from white to blue. This is because that shot was originally intended to be used when Brett was killed.
Continuity mistake: At the end of the scene with the ex-leper you see Brian's mother open the door to their house twice; first in the background of a wide shot, then in a closer shot. (00:15:25)
Continuity mistake: In the scene where Joe Gideon is helping his daughter with dance exercises and realises that it is time to put Michelle in a cab, he carries her out of the rehearsal studio with her facing forward and her legs wrapped around his back. They turn a corner to go outside and she magically is facing him arms around his neck and legs wrapped the other way around his waist. Also Michelle suddenly grows a yellow rain jacket. There is no time lapse in the dialog which would explain this turn.
Continuity mistake: When Goose crashes his motorbike, he lands on his front. The previous shot shows him falling back-first.
Continuity mistake: When the stairs are first shown, there's carpet up the middle of the stairs. At the end when they flee the house it's gone.
Continuity mistake: When Apollo Creed is approaching the ring for the rematch at the end of the film, his robe starts off done-up, next shot shows it undone and the towel around his neck loose, and then in the last shot it's back to being neat again with the robe done up. Even when he enters the ring it's all neat and tidy. (01:32:40)
Continuity mistake: When the child serves the ice cream there is a difference in the size of the ice cream he serves and the spoonful he eats.
Continuity mistake: During "Easy To Be Hard" a redheaded woman disappears and reappears on a park bench.
Continuity mistake: Lupin's car windows are blown away in the car chase, and he and Gingen break all the remaining shards of glass from them. They then return again when lupin pulls up to the princess' car, then disappear in the following shot.
Continuity mistake: As the two look-outs get on the big wheel the thin guy with the ventriloquist's dummy sits on the right. But later in the film he is on the left.