A new trailer for Paranormal Activity 3 has been released, and it looks as though all hell breaks loose. The third entry in the franchise is a prequel to the first two films, and attempts to connect everything together as it shows protagonist Katie’s younger years. This trailer seems to reveal a good chunk of the movie to audiences, and the gags seem much more overt and fake than the sinister and understated ones of the first film. It also looks like a lot of this film takes place during the daytime, which is not scary because everyone knows that creepy things only throw people around at nighttime.

Additionally, Paramount is trying to recapture the “demand the film” craze that made the first film such a big hit in theaters. This time, the film will open in 20 cities on October 18th, three days before it opens nationwide. The winning cities will be chosen by the 20 cities that have the most tweets. Hit the jump to watch the trailer and for more details on the “Tweet to See It First” campaign. Paranormal Activity 3 opens everywhere October 21st.

Click over to Apple to watch the trailer in HD.

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For the "Tweet to See It First" campaign, all you have to do is go to www.ParanormalMovie.com and select your city from the map. Here’s the full press release:

HOLLYWOOD, CA (September 28, 2011) – In an unprecedented move, Paramount Pictures will debut PARANORMAL ACTIVITY 3 exclusively in cities where the most fans “Tweet To See It First”. This first ever of its kind campaign launched today at 8:00 a.m. PDT and is open to fans worldwide. PARANORMAL ACTIVITY 3 will premiere on October 18th in the top 20 cities with the most tweets, 3 days before the film’s global release.

“The support of this franchise from the online community is phenomenal. We again look to reward them for that support by offering them the chance to see it first, this time expanding our reach globally,” said Rob Moore, Vice Chairman of Paramount Pictures.

To vote, fans can go to www.ParanormalMovie.com and select their city from a global map, which will also serve as the point of entry to create a tweet with a special set of hash tags that link directly to twitter. Once a tweet posts, it counts as a vote. A leader board will show the top 20 global markets in real-time.

The “Tweet To See It First” competition is available to audiences worldwide and ends at 11:59 p.m. PDT on Thursday, October 13th. The top 20 cities will be announced on Friday, October 14th.

PARANORMAL ACTIVITY 3 is produced by Jason Blum, Oren Peli and Steven Schneider and directed by Henry Joost and Ariel Schulman from a screenplay by Christopher Landon. Follow PARANORMAL ACTIVITY 3 on Twitter at www.Twitter.com/TweetYourScream for audience reactions and important announcements.