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Paranormal Activity 4 (2012) Poster

Goofs

Audio/visual unsynchronised 

When Alex crashes backwards through the garage door, we hear the sounds of the car hitting the door before the car even hits it.
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Character error 

During the ending scene, when Alex is looking for her father at an empty bedroom, we can hear a boy (presumably Wyatt) calling his sister 'Kathryn' not 'Alex'.
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Continuity 

When Alex first goes outside into the garden with Ben after her night with her friends, her hair is curly. When she returns it's straight.
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Towards the end of the film where the woman rushes towards Alex and Alex slams the door, she is clearly wearing a dark blue top just as the door slams, however as she smashes through the door with the left arm and upper body, she is now wearing a white top.
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The frog-shaped air purifier in Wyatt and Robbie's room continually disappears and reappears between shots.
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In one scene, Alex follows a trail of toys into Wyatt's room. She inspects his closet and behind her, the toy train turns itself on. Startled, she turns around to head downstairs. On her way out of Wyatt's room the toys are now gone.
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When Holly is cooking dinner the knife flies into the ceiling. Later that night when Alex goes to the kitchen the knife is not in the ceiling.
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After the ball bounces down the stairs Alex goes up to investigate the noise, the ball is still on the stairs. When she comes back down again the ball is nowhere to be seen.
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The time tags in the lower left-hand corner of many of the cameras disappear and reappear several times throughout the film.
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Revealing mistakes 

At the beginning when Katie takes Hunter away from her sister, you can see Katie's outline standing outside the doorway but she is still downstairs in the lounge room.
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When Alex shows Ben the footage from night #1, the Calendar icon in the OSX dock clearly shows a one-digit number (possibly 6, since that's the date it's supposed to be). However, when the shot changes to a closeup, the icon now says it's the 17th.
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See also

Trivia | Crazy Credits | Quotes | Alternate Versions | Connections | Soundtracks

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