Grease - Crater Face Reverses Too Early
In the scene where Kenicki and Rizzo are making out in the back of the car, Craterface backs into them deliberately. But if you look at the interior shot of Kenicki's car about 25 seconds earlier, you can see Craterfaces car about to back into them. They obviously originally had the crash happen earlier, then added some more dialogue, sending it out of synch.
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