5 Paranormal Activity Facts

 2. Upon release, Paranormal Activity 2 broke the record for the biggest opening for a horror movie of all time. It earned a total of $41,500,000 in its opening weekend.

3. Most of the acting was improvised. No scripts were given out, only guidelines on how to behave or what to discuss in their scenes.

4. Paranormal Activity director Oren Peli got the idea for the movie from a personal experience. Late at night he was sleeping and a box of detergent fell off the shelf. He says the box was pushed too far back for it to just tilt and fall.

5. Because the crews are so small and filming location so restricted , many sound effects are added later in post-production. 

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