Paranormal Activity: The Marked Ones

(at around 4 mins) According to an interview with Jorge Diaz, when he did his scene where his character Hector performs a stunt on a laundry basket, he was supposed to glide down the stairs fast. However, the basket (supported with wire to pull it down the stairs, along with a skateboard underneath the basket, its wheels removed) often got stuck between in the steps. Finally on the last take, a member of the crew yanked the cable, which brought down the basket and actor to the bottom of the stairs; eliciting Diaz's genuine reaction. This last take was used in the final film.

(at around 28 mins) When Jesse is showing Hector his new trick of leaning backwards without falling over you can see the wires holding him in place - it's wrapped around his right foot in the long shot.

The Paramount opening credit is shown having glitches like when demon presence get caught by the video camera

The Unrated version has an extra 17 minutes of footage incorporated into the film; half of it being humorous.