Plot hole: At the end of this movie, (1988) Kristi and Katie's mother died. In the first Paranormal Activity (2006), when the psychic is visiting he says it feeds off negative energy, and Micha says "I guess we can't have your mother over anymore."
Paranormal Activity 3 (2011)
1 plot hole
Directed by: Ariel Schulman, Henry Joost
Starring: Christopher Nicholas Smith, Chloe Csengery, Jessica Tyler Brown, Lauren Bittner
Revealing mistake: While driving the Mercedes to the house of grandma, the gauges on the dashboard show speed is zero and the engine is cold.
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