The Insider.com

Horror films are almost always frightening in some way but are even more terrifying when the story is said to be based on a true story like the new film The Possession, which is based on the real-life story of the Dybukk box that ravaged a family.

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"I think it definitely makes a difference," said Kyra Sedgwick, who plays the mother of a girl who becomes possessed after opening the haunted box. "I remember seeing 'Blair Witch Project' and being convinced that it was real, and it made it a lot scarier."

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Jeffrey Dean Morgan, who plays the girl's father, described the back story behind the film:

"This is based on an article that was written in...2003 about a box that went for sale on eBay in 2002. The guy who bought it chronicled the events that started happening in his life that directly correlated with this box. It's frightening."

Morgan, who currently stars on the TV show Magic City, says that even though the story upon which the film is based is believed to be true, he is still debating whether he believes in the supernatural. However, he did note some strange, seemingly inexplicable events during production.

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"I'm a big believer in what I see is what I believe," he said. "I like to be able to touch and experience, but that being said, we had some very bizarre things happen in the making of this film that certainly made me think."

In addition to an eerie old mental institution that had some of the crew members fearful to enter, Morgan also shared a few strange occurrences during the film's production that furthered his thoughts about the supernatural.

"The weirder stuff for me was: lighting rigs exploding and drafts of air coming through when you're in a closed studio," he said, "[It's] just stuff that makes the hair on the back of your neck stand up."

The Possession is now in theaters.