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Sometimes the most disturbing films aren't always the ones you expect - a lesson you learnt the hard way when you first watched Watership Down as a kid.
From Requiem For A Dream to Midsommar, filmmakers have always loved messing with our heads, often leaving us with a lingering uneasy feeling that we simply can't shift but also cannot explain.
In a recent Reddit thread, movie fans shared the most disturbing films they'd ever seen, with the conversation racking up more than 17,000 upvotes and thousands of comments.
Some suggested films that you may have heard of such as We Need To Talk About Kevin, the 2011 adaption of the novel of the same name by Lionel Shriver.
One Reddit user referred to the film as 'one of the best movies I never want to see again', while another added: "This film has singlehandedly made me never want to become a parent."
Similarly, 1980 Italian cannibal flick Cannibal Holocaust seemed to crop up a fair bit thanks to its controversial reputation, with Reddit users saying there were 'a lot of f***ed up scenes in that movie', with one saying: "Especially the tortoise scene, it was horrific and not staged."
For those who haven't had the pleasure of watching Cannibal Holocaust, some of the scenes were essentially so graphic that people weren't sure whether the violence shown was staged or genuine - with actors having to come forward to prove they weren't actually dead.
One person suggested Threads, a 1984 apocalyptic war drama set in Sheffield, England, writing: "It's the most frightening film ever made. Also consider that it was released at a time when it was a very very likely scenario."
Another chipped in: "My dad was a sound engineer who worked on Threads. He's said it gave him nightmares for years."
There were also mentions for Men Behind The Sun, an exploitation horror film depicting the war atrocities committed against Chinese and Soviet prisoners by the Japanese towards the end of World War II.
Others had painful memories of watching Kids (1995), a coming-of-age movie starring Leo Fitzpatrick, Justin Pierce, Chloe Sevigny and Rosario Dawson that basically involves a lot of STI-ridden encounters and drugs.
Someone else also spoke about 2007's The Girl Next Door, saying: "Not the porn one, but the one about [teenage murder victim] Sylvia Likens.
"The true story is even more horrific than the movie. If you have a strong gut I suggest reading the wiki page on that poor child. Easily one of the most horrendous things I've ever heard of."
Agreeing, another said: "This movie left me feeling sick for weeks. I also recommend An American Crime, also based on Sylvia Likens.
"Elliot Page gives one of the best performances I've ever seen playing Sylvia, and it's a little more true to the story. Both films are amazing and deeply disturbing, and like you said, don't even scratch the surface of what Sylvia had to endure."
One other person said they'd watched 'a lot of crazy movies', but one stuck out above the rest.
They wrote: "Irreversible, Saló, A Serbian Film, Lilya 4-Ever, Martyrs, The Road... But the most disturbing for me personally, was a war movie called Come And See.
"The heaviness lasted for days after."
Featured Image Credit: Men Behind The Sun/Grand Essex Enterprises
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