When The Exorcist opened in 1973, people were fainting in the theater. This story of an innocent girl possessed by a demon continues to horrify audiences to this day, and as is the case with many beloved horror classics, The Exorcist conspiracy theories abound.
It is true that what appears on screen isn't the entire story. Things were equally as strange and shocking with The Exorcist behind the scenes. From extreme acting techniques to rumors of a curse, these weird facts about The Exorcist are almost as alarming as the film itself.