Continuity mistake: When the twins are singing about Brad for the talent show, and Michael was playing the piano (you have to listen and watch), his hands are suppose to go across the keys but he is still doing the fake up-and-down-hand-move.
Continuity mistake: After we see the twins push Crater-Face into the pool, we see them a couple of scenes later after Michael reveals himself as the mystery rider and we notice that the twins are completely dry.
Continuity mistake: When Michael is doing his bike up and is spraying the cycle's gas tank, his hands are full of oil, but in between his fingers are clean. This shows that is is obvious someone has smeared the oil on, otherwise in between his fingers would be just as dirty. And his hands wouldn't be perfectly black, they would be streaked.
Continuity mistake: The scene when Michael is jumping over the cop car and it cuts to a front shot of the jump, you can see Stephanie, Paulette and Rhonda watching him jump in the background, even though Rhonda had walked back inside the bowling alley with Goose and Davy before Michael reappeared from the chase.
Continuity mistake: In the scene at the end when Johnny gets out of the raft, you see him walking up through the back of the crowd and in the next shot, he is throwing his costume off his back on the side of the pool, then cuts back to him coming between Michael and Stephanie.
Continuity mistake: "We're Gonna Score Tonight" - 3:30 into the song, Johnnie rolls a ball down the lane and turns around, throws his arms in victory. In the very next shot, he is jumping from some height to the ground. There is also an obvious cut in the music at this point.
Continuity mistake: Dimucci is wearing grey trousers when they start singing Prowlin, but he has jeans on for the second half of the song.
Suggested correction: That's because it's gone from the night out with the gang to the next day at school.
I'm not sure about this "correction." Every other song in this film is done in real time, why would this particular song take place over 2 days? Since the rest of the T-Birds are in the same clothes, and Dimucci is wearing the same shirt, I would say it was a mistake that his pants changed.
They are all wearing different clothes except possibly Johnny. Goose goes from a flannel shirt to a blue T-shirt. Davey goes from a brown shirt to a yellow shirt. DiMucci goes from a red shirt to a blue/grey shirt. Johnny is wearing all black, but he does so in every scene except at the bowling alley. The start of the song is at night and the second part is at school, meaning they would have to be there during the school-day or just after when they would have access to the auditorium.
Continuity mistake: During "Score Tonight" as Johnny is singing 'hey Paulette...' we can see Goose lifting Dolores up onto his shoulders but in the next shot he is holding her piggyback.
Continuity mistake: When the movie starts, two women raise a flag. The hands of the one on the left change positions between shots.
