Paranormal Activity Plot and endings .

Plot

Katie, a student, and her boyfriend Micah, a day trader, live in a two-story tract house in suburban San Diego, California. Katie claims that a ghostly presence has haunted her since her youth and believes that it has followed her to their new home. Micah buys a video camera in the hopes of capturing paranormal activity on film. During a visit to their house, Dr. Fredrichs, a self-professed psychic, assesses that they are being plagued by a demon which feeds off negative energy and is intent on haunting Katie no matter where she goes. Dr. Fredrichs also recommends the two contact Dr. Johann Avery, a demonologist, and Micah's reluctance to do so leads to arguments between the couple. Each night, Micah leaves the video camera on a tripod in their bedroom to record whatever might be occurring while he and Katie sleep. He manages to document several phenomena such as objects moving on their own, lights and televisions switching on and off, and sounds ranging from voices and growls to footsteps and loud thuds. The strange occurrences in the middle of the night soon involve Katie awakening to spend several hours standing by the bed staring at Micah while he sleeps and going outside to sit on the backyard swing, none of which she remembers the following morning.
Katie, already irritated by Micah's making light of the situation, becomes irate when Micah brings home a Ouija board, despite Dr. Fredrichs' warning against any attempt to communicate with the entity. While the two are out of the house, a wind blows through the living room and the Ouija board's planchette moves on its own. A small fire soon erupts on the board, extinguishing itself seconds later. That night, Micah sprinkles talcum powder in the hallway and later they find inhuman footprints leading to the attic. There, Micah finds a charred photograph of a young Katie previously thought to have been destroyed in a house fire. The next night, the bedroom door slams itself shut and is violently knocked and banged upon from the other side. That day, a glass picture frame breaks and the image of Micah inside becomes scratched. Dr. Avery is abroad when Micah finally agrees to invite him, so Dr. Fredrichs agrees to make a second house call. However, Dr. Fredrichs immediately has a sense of foreboding upon entering their home, and apologetically leaves despite Katie and Micah's desperate pleas for him to stay and help.
The next night, Katie is dragged out of bed and down the hallway by an invisible force. Hearing her screams, Micah gives chase and wrestles her away, and Katie emerges from the struggle with a gruesome bite mark on her back. Stressed and exhausted, the couple decide to go to a hotel. Micah later finds Katie gripping a crucifix so tightly that it bloodies her palm. Just as Micah is set to leave, a suddenly calm Katie insists they instead remain at the house. When Micah leaves her, she begins to smile as she closes her eyes. That night, Katie awakens to once again stare for several hours at Micah while he sleeps. She then goes down the stairs into the darkness and begins screaming. Micah wakes up and runs to her aid, and the camera can only see the bedroom and dark hallway as it records what sounds like a struggle upon his arrival downstairs. Micah and Katie's screams suddenly stop, and the brief silence is followed by the sound of heavy footsteps coming up the stairs. Micah is suddenly hurled at the camera, knocking it over. Katie slowly walks into view, her clothing covered in blood. She crouches to sniff at Micah's body, eerily smiles at the camera, then lunges toward it with a demonic growl as the screen cuts to black. An ending title card states that Micah's body was discovered days later by the police, and Katie's whereabouts remain unknown.

Alternate versions

Several different versions of the film exist.The ending shown in theaters for the movie's nationwide and worldwide release does not match endings previously seen at the Screamfest and Burbank screenings.

Original Version * the 1 i saw *

The original cut of the film, which was sent to potential distributors, was longer at 97 minutes. Several scenes present in the theatrical version were absent, such as Katie discovering her keys on the floor and Micah's picture being slashed. The original cut also included an extended scene involving internet video footage of a possessed girl (whose story on the internet was read by Micah) chewing off her own arm.
This version's ending did not involve Micah's body being thrown at the camera, but instead featured Katie returning to the bedroom, after the struggle heard downstairs, wielding a knife with blood on her tank top. She then sits next to the bed and rocks back and forth in a catatonic state throughout the remainder of the following day. Her friend Amber calls the house, and later arrives, discovering Micah's body downstairs. When police officers arrive, Katie comes out of her catatonic state and confused, approaches them. The officers instruct her to drop the knife, but shoot her after being startled by a door suddenly slamming behind them. The movie ends with audio of the police discovering the camera as the credits roll.

Third version
A third version of the film was shown at only one public viewing.This version's ending featured Katie returning to the bedroom with the knife and slitting her own throat in view of the camera. This ending is included on the DVD and Blu-ray disc of the film.


source from : http://en.wikipedia.org/wiki/Paranormal_Activity_(film)