12+ Horror Movie Fan Theories That Make Your Favorites Even Scarier

Event Horizon follows a group of space explorers who take Dr. William Weir back to his spaceship, the Event Horizon, so he can retrieve his experiment. The plan seems simple enough, up until Weir reveals that his experiment is a machine that opened a portal to a Hell dimension full of chains and nails that's reminiscent of the Hellraiser films.

Redditor /u/SteveRudzinski believes that the similarities are more than just coincidance, and that the two stories take place in the same universe. The theory is that you don't need the Lament Configuration to reach the Cenobites as long as you have something that can open the door. When Weir becomes a demon/Cenobite at the end of Event Horizon, his transformation resembles the Cenobites from the Hellraiser comic book series.

If you want to check out this theory, you can watch all of the Hellraiser films on Shudder.

The Saw series is known for its elaborate traps, all of which are created by Jigsaw and his followers. As the traps became more detailed, fans of the series began connecting the dots between the horror franchise and the Kevin McAllister, the young sadomasochist from Home Alone .

Throughout the Home Alone films, Kevin becomes obsessed with crafting intricate traps, befriends Old Man Marley after mistaking the stranger for someone more sinister, and repeatedly evidences a mean streak that's justified by a sense of unserved justice; all of which lines up perfectly with Jigsaw's personality traits. The two even look sort of alike, so it's totally believable that they could be the same person.

Whereas in the first Home Alone, Kevin is simply trying to defend his family home from intruders, the sequel highlights the child's darker side. The second time around, the Wet Bandits want nothing to do with the McAllister family, and aim instead to rob a toy store located hundreds of miles from their Chicago home. Despite having no ties to the offense, Kevin decides to set up a kill house in an abandoned New York City apartment building (a very Jigsaw move), and proceeds to torment the two crooks until life in prison seems like a reward. The tyke starts by bashing in their heads with bricks, and things only get more grisly from there.

It's a little unclear why Elm Street's Freddy Krueger continues to torment local children without rest. Yes, he's getting back at the people who burned him alive after he took advantage of a bunch of children, but surely he should have found satisfaction long before The Final Nightmare. What if there's something else going on? 

Redditor /u/softhandsam believes that Krueger collects the dreams of the teens he slays to expand his supernatural powers. The user notes that in the original film, Freddy is significantly less powerful than he appears to be in later movies. The Redditor thinks that "one could logically assume that many of Freddy's more outlandish abilities, such as walking on the ceiling in the first movie or shapeshifting a whole bunch in the third, are actually dream powers he stole from kids whose souls he consumed."

You can dive even deeper into the world of Freddy Krueger by streaming Never Sleep Again: The Elm Street Legacy on Shudder.

Strap on your hockey mask, because here comes a wild Friday the 13th theory. In the films, the slayer isn't actually a grown-up Jason Voorhees, he's actually a deadite, AKA the demons from the Evil Dead films. This theory comes from multiple sources who put their heads together on Reddit after user /u/ Bacxaber said that they believe Jason is actually an evil spirit. A few other Redditors pointed out that the Necronomicon appears in both Jason Goes To Hell and the Freddy vs. Jason vs. Ash comic, so it's likely that Jason is explicitly tied into Evil Dead canon.

If you consider yourself a Jason Vorhees buff, you can check out Crystal Lake Memories: The Complete History of Friday the 13th on Shudder to confirm this theory.

For years, fans of The Blair Witch Project have been trying to figure out how Heather and her friends were able to get so lost while hunting for the Blair Witch in a National Forest. A user on the Blair Witch forums believes that, after entering the woods, it's possible that Heather and co. walk into a time loop that sends them back to the 1940s, when Rustin Parr was allegedly possessed by the witch. 

Evidence to support this theory can be found in the game Blair Witch Volume I: Rustin Parr, which takes place in the '40s. In Parr's house, the player catches a glimpse of Heather Donahue running past them, which correlates to the final moments of the first film. 

This theory was pretty much confirmed in 2016's Blair Witch sequel. In the film, time moves differently for the characters after they enter the forest; they lose track of some locals for a few hours, and when they're reunited they claim to have been missing for days. Additionally, the main characters' quest is inspired by footage of the witch that's posted on YouTube, but it's later revealed that the footage was filmed by the protagonists. Without time travel, this plot point is utterly unexplainable. 

Throughout The Exorcist, the audience is repeatedly assaulted with the demonic face of Pazuzu, who watches over the proceedings. It's spooky, but it also serves an in-film purpose according to Redditor /u/Hendricks47. They believe that Pazuzu relays information to Father Karras that is collected by another demon informant. This second informant is none other than the homeless man who asks the Father for money early on in the film. When Regan repeats the homeless man's words later in the movie, it's meant to suggest that Pazuzu is always watching Father Karras.