10 More Hardest To Watch Horror Movie Moments

Let's be honest, it's not a "hardest to watch" list without the Argentine king of the gruelling image himself, Gaspar Noé. And his French-language psychological dance horror Climax delivers the goods in typically miserable fashion.

A troupe of dancers experience life-changing repercussions on the final night of rehearsals in their dance hall after the communal sangria bowl is spiked with LSD. Rational thinking goes out of the window, and dance-based madness descends. The dancers fight and argue, one of their number suffers a violent miscarriage, a brother and sister have sex; the consequences are many, but few as severe as the fate of Emmanuelle (Claude Gajan Maull) and her son Tito (Vince Galliot Cumant).

Having locked Tito in the electric room for his own safety, Emmanuelle subsequently loses the key and starts to freak out. As she searches desperately to try and free the boy, who can be heard hallucinating, screaming for help, the hysteria is panic-inducing, the tension built not just here but throughout the entire film by long, unbroken takes. But it is the final unseen moment of the scene that makes it more challenging than most. We all know what's at stake, but when the hall suddenly plunges into darkness and red emergency lighting comes on, our worst fears are confirmed, and Emmanuelle breaks down in a moment of purest horror.