October is almost upon us, which means it's time for another suburban found-footage spookfest in the 'Paranormal Activity' series. Indeed, somehow they've managed to stretch the simple concept about a pesky bedroom-dwelling demon into a major horror franchise. And why not? The people enjoy being jolted, and 'Paranormal Activity 4' could provide the most jolts yet, based on the new teaser footage released. Check it out after the jump.

Wisely, Paramount Pictures continues to keep the bulk of the movie's plotline under wraps, preferring instead to disorient with a small handful of shadowy, mysterious images. Obviously, the filmmakers behind this series continue to expand on the simple set-up of the first movie, but the basic principle is still the same: Freak people out with easy but effective scares. Works every time.

This installment was directed by Henry Joost and Ariel Schulman, the 'Catfish' directors who also helmed 'Paranormal Activity 3.' The fourth installment opens on October 19th. Give the footage a look below and let us know what you think.

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