Continuity mistake: Russell asks Debbie to try and slam his arm in the car's door to show its sensor. After she slams his hand the second time, the door remains open. In the next shot, it is closed. In the next wide shot, the door is now open again.
Vacation (2015)
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Directed by: John Francis Daley, Jonathan Goldstein, Jonathan M. Goldstein
Starring: Chris Hemsworth, Christina Applegate, Leslie Mann, Ed Helms, Elizabeth Gillies, Skyler Gisondo, Steele Stebbins
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More mistakes in Vacation
Kevin Griswold: There was a hole in the side of my stall.
Rusty Griswold: Sounds like you found yourself a glory hole.