This third venture into the lives of sisters Kristi and Katie being haunted by a demon is more back-story than scary.
You'll discover the origin of the Paranormal Activity. While the DVD boasts, "The last 15 minutes will mess you up for life" have no fear - it really won't. It just provides the explanation.
Back in the 80s when Kristi and Katie were young girls, their mother, Julie, and her boyfriend, Dennis, move into a new home. Dennis videotapes weddings and so we have our collection of video recordings of how this new house is haunted.
Kristi has an invisible friend named Toby and this thing wants something; least of all being called fat. ("Don't call him fat") Katie doesn't believe Kristi at first. Then she plays Bloody Mary with Dennis' assistant and the house begins to come apart.
While there are a few jump-in-your-seat scares, this film simply cannot recapture the building dread of the original. (But I will admit that a scare involving a closet did cause my heart to literally stop for a split second.) You'll get the multiple camera angels: two bedroom shots and the kitchen. You'll get the sudden kitchen scares and the camera-on-the-oscillating fan gimmick does provide a couple nice effects.
They left enough story open in order to continue the saga if they wish (and they will).
I remember being frightened by the original and then intrigued by the simple genius of the filmmakers. With the two sequels, I seem to have lost whatever "fun" I had. It's almost like the Matrix movies where the original was superb but the sequels were just too heavy for their own good.
Sometimes I wish Hollywood would leave well enough alone and not rush sequels.