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Continuity mistake: When Will tosses the envelope with money on the table, it moves away/closer to the stack of papers, depending on the angle.

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Revealing mistake: When Will's dad's Alzheimer boosts and he smashes the car driving in reverse, the headlight of the car behind is blatantly loose to increase the drama of the crash.

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Continuity mistake: When a student brings Liz a box with cookies, it swaps from laying straight on the table to skewed, depending on which angle is shown.

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Continuity mistake: During the car wash, Elizabeth swaps from being dry to soaked and back to dry between shots.

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Continuity mistake: The very same shot of a boy staring at Ms Quirrel in awe is repeated twice.

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Continuity mistake: When Russ tells Liz that he's falling in love with someone, she is leaning against the wall on the angles from behind, but standing straight on the angles shot from in front.

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Continuity mistake: Elizabeth paints on one of the dresses on the magazine, yet in the next angle all three have ink marks on them.

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Continuity mistake: After Elizabeth marks the dress with a red felt pen, she takes her right hand toward the center of the page. A frame later, from a different angle, the hand is on the desk, above the page.

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Continuity mistake: When Ferris talks to Cameron and plays with the mouse, the keyboard comes closer to the edge of the table between shots.

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Continuity mistake: When Ferris calls Cameron, the mess by his phone changes between angles.

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Continuity mistake: When Ferris turns off the shower, the steam disappears in the close-up angle, only to reappear half a second later.

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Continuity mistake: When the movie starts and Ferris' parents leave the room, his right arm swaps from being over the blanket to under, between frames.

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Continuity mistake: When the opening credits are rolling, Jenny shows up in the bedroom and Ferris's hair keeps swapping from messy to brushed back and forth.

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Continuity mistake: When the movie starts, Ferris's in bed, his fringe all over his forehead. A frame later it's brushed sideways.

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Trivia: The newspaper where Barnaby leaves his fingerprints is Le petit vingtième, an inside joke to the children's supplement newspaper where Tintin's adventures were first published.

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Continuity mistake: During the car chase, when the red car is about to arrive to the railroad crossing, drives in front of the white car and crashes against a truck, the cars behind appear/disappear between shots.

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Visible crew/equipment: During the car chase, Bruce Willis' stunt double is very noticeable in the wide shots.

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Continuity mistake: During the car chase, the damages on the red car's lights appear/ disappear between shots.

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Continuity mistake: When Barnaby is shot, the newspaper keeps moving away/towards him between shots.

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Trivia: The cartoonist at the start of the film is Tintín's creator Hergé.

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