Some movies are unsettling because of what happens on screen, while others become even harder to watch once you discover what was happening while they were being made. Difficult productions, disturbing accidents, unusual decisions, and real events surrounding the cast can completely change the way certain scenes feel. Sometimes the story behind a movie is almost as memorable as the movie itself, especially when something unexpected happened during filming that audiences never knew about. Once you learn these details, certain moments can carry an entirely different weight. Here are 15 movies whose behind the scenes stories make them considerably more unsettling to revisit.IMDbThe Exorcist (1973)The production became surrounded by a series of accidents, injuries and deaths involving people connected to the film, giving its reputation a genuinely unsettling edge. Linda Blair also endured physically demanding makeup and effects work that left her with real discomfort during filming.cnx.cmd.push(function() {cnx({playerId: "106e33c0-3911-473c-b599-b1426db57530",}).render("0270c398a82f44f49c23c16122516796");});IMDbThe Twilight Zone: The Movie (1983)A helicopter crash during filming killed actor Vic Morrow and two child actors, Renee Shinn Chen and Myca Dinh Le. The accident led to major changes in film safety practices and permanently changed the way the production is remembered.IMDbThe Crow (1994)Brandon Lee was accidentally killed on set when a prop gun fired a projectile that had become lodged inside the barrel during an earlier stage of production. The film was completed after his death, making his final performance deeply difficult to separate from what happened during filming.IMDbThe Omen (1976)Several people involved with the production experienced disturbing real life incidents during and around filming, including lightning strikes and an actual dog attack. The stories became part of the movie’s eerie reputation, especially because the film itself revolves around an unusually dangerous child.IMDbPoltergeist (1982)The so called Poltergeist curse became one of the most persistent stories surrounding the production after several cast members died in the years following the film. The death of young actress Heather O’Rourke at just 12 years old made the story particularly haunting.IMDbApocalypse Now (1979)The production became famously chaotic, with an enormous budget, severe weather, and difficult shooting conditions pushing the crew to the limit. Martin Sheen also suffered a heart attack during filming, leaving the production uncertain about whether its lead actor would survive.IMDbRoar (1981)The cast and crew of Roar worked alongside dozens of real lions, tigers, and other wild animals without the safety standards that would be expected today. Several people were seriously injured during the production, making the finished movie feel considerably more alarming once you know the animals were not trained performers.IMDbThe Wizard of Oz (1939)The famous production placed its actors through remarkably difficult working conditions, including heavy costumes, uncomfortable makeup, and dangerous materials. Margaret Hamilton suffered severe burns while filming her disappearance scene when a special effect malfunctioned.IMDbFitzcarraldo (1982)Werner Herzog’s production became notorious for the extreme lengths taken to create its central images, including physically moving a massive steamship over a hill in the Amazon. The shoot was plagued by accidents, illness, and conflict, creating a production story almost as intense as the film itself.IMDbThe Shining (1980)Stanley Kubrick’s demanding approach pushed the cast through an exceptionally long and stressful production. Shelley Duvall was subjected to repeated takes and intense scenes over months of filming, contributing to the deeply uncomfortable atmosphere surrounding the movie.IMDbThe Passion of Joan of Arc (1928)Renée Jeanne Falconetti’s performance became legendary partly because director Carl Theodor Dreyer demanded an extraordinary level of emotional intensity from her. The production’s austere approach and the film’s stark subject matter created an experience that was reportedly exhausting for its star.IMDbJaws (1975)The mechanical shark repeatedly malfunctioned, forcing Steven Spielberg to redesign much of the production around what could actually be filmed. The delays and difficult conditions turned the shoot into a famously stressful experience, while the resulting limitations helped create the shark’s frighteningly restrained presence.IMDbA Clockwork Orange (1971)Malcolm McDowell’s most notorious scenes involved uncomfortable physical conditions that were not always simulated. During the filming of the eye opening scene, the device used to hold his eyelids open caused him real pain and eventually damaged his cornea.IMDbThe Deer Hunter (1978)The production’s infamous Russian roulette scenes involved actors performing under physically and emotionally demanding conditions, while Christopher Walken and the rest of the cast were immersed in an intensely bleak story. The film’s behind the scenes atmosphere was reportedly as difficult as the material it was portraying.The post 15 Movies That Become More Disturbing Once You Learned What Happened Behind the Scenes appeared first on Den of Geek.