The microbudget film fully leans into the haunted house trope, terrifying viewers with its menacing demons and one-of-a-kind séance scenes. With that said, movies featuring supernatural experiences are typically inspired by real-life events — but that isn't the case here. As it turns out, Insidious isn't based on a true story.

However, the filmmakers — James Wan and Leigh Whannell — drew from a few supernatural events to inspire some moments in the film. In a featurette included in the movie's Blu-Ray titled "Entities," director James Wan revealed that a story from a friend of his and writer Leigh Whannell inspired the creation of The Long-Haired Fiend.

"The Long Haired Fiend was, actually, a character that was inspired by a story that Leigh and I had heard from a friend of ours," James explained, per Cinema Blend. "He said, one night he woke up and saw a man dressed in a long trench coat with long hair pacing outside his room. So, that was where the image came from."

Creeeeeeeepy!