So you just watched the Excorcist you brave souls, but did you know that the screaming you hear from the main protagonis Linda Blair, acting so good she got an Oscar nomination and won a Golden Globe for it. Turns out this very convincing realistic acting, was so convincing because the harnass of the floating bed that she crashed back unto in the levitation scene broke her back in 3 places breaking three vertebrae needing prolonged rehabilitation and never regained full function and worse, left her with chronic pain ever since the trauma. Talk about suffering for your art.