Grease

Revealing mistake: In the soda shop, the waitress turns off the lights with her elbow because her hands are full, but she misses the light switch by 6 inches. (00:55:10)

Revealing mistake: At the dance, there's a scene where everyone started dancing after Cha-Cha and Danny won the trophy. Well Marty comes in from the side of the screen and lands on the floor in some kind of split, and you can see she is wearing a knee pad on her right knee.

Revealing mistake: When Sandy checks into school for the first time, she goes down to the office and the assistant principal gives her some forms to fill out. If you look closely, you'll be able to see that the top form is just a blank piece of paper.

Revealing mistake: When Sandy is at the shop with the jock, then she goes to the jukebox, the picture behind the jock is all blurred out. You can tell it is a Coke sign - Coca Cola cancelled their sponsorship after filming. (00:43:30)

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Mistakes

Factual error: The movie and events take place in 1958. However, two Fender amplifiers that are used by the band, "Johnny Casino and The Gamblers" are "Silverface" models that were only manufactured between 1967 and 1981.

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Quotes

Principal McGee: We have pictures of you so-called mooners. And just because the pictures aren't of your faces doesn't mean we can't identify you. At this very moment those pictures are on their way to Washington where the FBI has experts in this type of identification. If you turn yourselves in now, you may escape a Federal charge.

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Trivia

Trivia: Olivia Newton-John had to be sewn into her trousers at the end of the film as the zipper broke. They were put on in the morning and she was not allowed to take them off or go to the restroom while they were on, as the crew would have to waste time sewing them back on.

Padzter

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Questions

Question: I can't understand why Sonny hauled Sandy off the dance floor during the dance finale. Sure Sonny was a bit of a jerk, but he idolized Danny and would never disrespect him. Also there was nothing to suggest that he and Cha-Cha were friends. I never truly understood.

Gavin Jackson

Answer: Watched that scene again now and I just think it was poor writing (in what's still a classic film regardless). How none of the judges noticed that Cha Cha took another girl's (Sandy's) place even after she'd already been "tapped out" is another huge plot hole. Plus a lot of people in America were watching the dance on TV and it's not mentioned by anyone after this scene. 35 years later and that scene still bugs me (haha).

Answer: I agree it plays a bit strange, but I always chalked it up to Sonny wanting Danny to win the dance competition and Sandy, although not bad, admits she's not on Danny's level, while Cha-cha is "the best dancer at St. Bernadette."

Also, he was drinking and upset so not thinking.

Answer: He's fall-down drunk, that's why. He's drinking during the entire dance.

Krista

Answer: When he's pulling Sandy away he is also yelling to Danny "Go! Go! Go!" So I was also wondering like if Cha-Cha told him to do that and they just failed to add that into the scene.

Answer: It was because they were going to moon the cameras, they didn't want to embarrass Sandy since she would've been offended if it happened when she and Danny were dancing.

Chosen answer: It's so Cha-Cha can go with Danny. You can see Cha-Cha giving Danny the eye. So Sonny took Sandy away for Cha-Cha's benefit.

Answer: Because in real life Olivia was late for work, as a result Annette had to take Olivia's place because she was her understudy.

Answer: It's a terrible moment in the story because it exposes Danny as being thoughtless. After already burning Sandy once (at the pep rally) you'd think he'd be mindful of not doing it again. This time, though, he humiliates her in front of the entire school, as well as on television. Unsure how Sandy's sitting with him in the next scene at the drive-in only slightly miffed. Imagine how this plays as a story to their children: "Hey, kids, did I ever tell you about how your dad embarrassed me in front of everybody?" I guess it's meant to be partly motivation for Sandy to change her image and outlook in order to keep Danny, but it's a terrible message (even back then). She's nothing but thoughtful and considerate, and Danny repeatedly treats her badly, but she decides she needs to reinvent herself. (Danny's makeover doesn't count given it lasts about three minutes.) It would've been better had Danny and Sandy came second because of Sandy's dancing, and that could've played on her mind.

Answer: He is so upset about Marty liking Ed Byrnes, he just drinks all night.

Answer: I think it was because Sonny was drunk and wanted Sandy to talk to Marty for him since she dumped him for Vince Fontaine at the beginning of the dance.

Answer: Well my theory is maybe since Sonny wants a girl, Cha-Cha promised him a date with a girl if he agreed to her plan.

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