Corrected entry: In the dance-off scene, 'Crater Face' is standing between Doody and Putzie and talking to then in a friendly fashion. If they were enemies as the film suggests, surely they would want to avoid each other?
Corrected entry: After Sonny is reprimanded by the principal for being late to class, he and the T-Birds run into Eugene on the stairs. Eugene is strolling along with his briefcase and doesn't appear to have any kind of pass or note that would indicate that he's on an errand for a teacher. So what's a goody-goody like him doing wandering the halls after class has started?
Corrected entry: All of the characters (except Sandy) speak with various kinds of New York accents, some of them very harsh, even though the movie is set in Los Angeles (or at least the west coast. Those big drainage gullies they had the race in don't exist anywhere near New York). You'll find New Yorkers anywhere, but that many in one place 3,000 miles away from home?
Corrected entry: When the principal is saying her last farewells to the students, notice what everyone is wearing. In the carnival that immediately follows the last class, these characters are wearing different clothes. I think it is unlikely that all would bring a change of clothes.
Corrected entry: At the end of the movie, when Sandy and Danny are dancing, she is wearing the all black outfit, with the black heels. but at one moment when Sandy jumps in from one side of the screen and Danny jumps in from the other side (I think they're singing "wop wop a lop a bim bam boom"), You can see Sandy is bare-footed.
Corrected entry: On the widescreen DVD version, there are sporadic shots in the dance-off gym scene when the windows are shown and it is revealed that it was light outside. I'm not exactly a guru on school dance times, but aren't they usually at night?
Corrected entry: During the "Beauty School Dropout" sequence, pay attention to Marty when she's singing. She appears to be bored and isn't mouthing some of the words.
Corrected entry: Rydell manages to have cheerleading tryouts and student council elections in the first few days in the fall of their senior year. No high school does that. Both of those activities are done in the last few weeks of the students' junior year to allow for cheer camp and such.
Corrected entry: Why does Frenchie have a TV in her bedroom? Only really rich people had multiple televisions in the 1950's. (00:25:05)
Corrected entry: When the cameraman says, "All right, get it!" during the performance of "Born to Hand Jive" at the National Dance Off, his mouth doesn't move.
Corrected entry: During the cafeteria scene in the beginning, Patty comes along and Frenchy rests her head on her left hand with her elbow on the table. The shot changes after Rizzo says "It's the biggest thrill of my life" and Frenchy's head is instantly no longer resting on her hand, and her elbow is off the table.
Corrected entry: During the dream car dance sequence, look at the many wires guiding the engine as it is lowered into the car with Danny riding on it. Also, notice the size of the white hook and chain. In the next shot, when the engine is in place and the chain is going up, it is a much smaller hook and the chain jumps around like a plastic prop.
Corrected entry: When Kenickie is first shown, he has two charms on his necklace. One is a small square one, the other is a star inside a circle. The camera cuts to Zuko, then when it cuts back to Kenickie, the square charm is gone. It reappears in a couple of scenes later in the movie, then disappears again.
Corrected entry: Henry Winkler and Marie Osmond were the first choices to play Danny and Sandy. Winkler turned down the role to avoid being typecast, as he was better known as the Fonz (from the TV show "Happy Days"), a character known for wearing a black leather jacket; Osmond declined for "moral reasons," probably due to her strong Mormon beliefs.