Continuity mistake: The rear view mirror disappears when Jeanie is speeding home.

Ferris Bueller's Day Off (1986)
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Directed by: John Hughes
Starring: Matthew Broderick, Jeffrey Jones, Mia Sara, Alan Ruck, Jennifer Grey
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Ferris: Cameron has never been in love - at least, nobody's ever been in love with him. If things don't change for him, he's gonna marry the first girl he lays, and she's gonna treat him like shit, because she will have given him what he has built up in his mind as the end-all, be-all of human existence. She won't respect him, 'cause you can't respect somebody who kisses your ass. It just doesn't work.
Trivia: Throughout the movie, many different characters either sing or hum the song "Danke Schoen". Ferris sings it in the shower, Mr. Rooney hums it while he is waiting at Bueller's front door, Jeanie sings it while running down the stairs after kissing Charlie Sheen, and Ferris sings it again during the parade.
Question: What did Rooney mean when he told Grace to "go soak your head"?





Answer: It's an old insult, somewhat equivalent to 'buzz off'.
Brian Katcher