Paranormal Activity BTW SPOILER ALERT!!

Hello Der!
I just got done watching Paranormal Activity and I just had to write about it.  AND IF YOU DON'T WANNA HAVE THE MOVIE SPOILED FOR YOU DON'T READ THE REST OF THIS!!!!

Two people Katie and Micah are getting haunted by a demon.  Katie was haunted by the same spirit when she was 8 years old.  This "thing" is walking around their house at night.  You can hear the footsteps but you can't see anything.  Micah gets a camera to record this spirit walking around their house.  He has a tripod and sets it up in their room.  Later that night their door moves back and fourth and they hear some footsteps.  Earlier that day they had called a doctor of ghosts and he referred them to a colleague of his.  Micah didn't want to contact him because he thought he could figure this thing out for himself.  The doctor tells him not to provoke the spirit and not to use a Ouija Board, but Micah gets one and tries to get Katie to try it.  She gets mad at him and they leave the house.  He left the camera on the tripod focused on the board.  While they are gone the heart starts moving around and the board catches fire.  Micah and Katie come back and Micah finds the board and tries to figure out the message.  Later that night Micah puts powder in the hallway leading to their room.  During the night they hear the steps and see the steps of powder and the couple start freaking out.
They call the doctor of demons recommended  by the doctor of ghosts.  And he doesn't answer.  They call the doctor of ghosts again and he comes to their house and instantly he says he can't be there and the spirit wants him to leave.  A few nights later the spirit comes in and grabs Katie from her bed and drags her down the hallway and bites her.  Micah grabs her back and they go back in their room.  The next day Katie is holding a crucifix.  Later that night the spirit grabs Katie and she starts screaming and Micah goes after her and they both start screaming down stairs.  All of a sudden the screaming stops.  We hear footsteps then Micah's body is thrown at the camera.  Then a bloody Katie and and she has a demonic expression.  She then goes to sniff Micah's body and then throws her face at the camera.

Well thanks for reading this.  I am probably off on a few facts and on how the events took place but you whatever.  I watched this movie today and I am creeped out.  I really don't feel like going to bed...