I have to say, torture porn movies don't disturb me, they just irritate me. It's just brainless, lazy gore and blood. Lets stick/slice/insert/shoot/ignite/launch pain inducing object X into body part Y, rinise repeat. It's not disturbing, it's juvenile and talentless drivel.
There's only been one moment in a film that has truly disturbed me, and it was in Lady Vengeance. Part of the vengeance "trilogy", if it can be called that, which included Oldboy. Though none of the three films are related in plot in anyway, they're all directed by the same guy.
The scene I'm referring to is when the parents watch the video that proves Lasy Vengeance was innocent, by showing the guilty culprits self-filmed video of the act. At the moment of horror, I though it would cut away, but it didn't. It was n'tgory, bloody or visually disturbing, but when they actually showed it I just felt violated. I remember feeling so numb for the remainder of the film, completely unable to get over what I had seen, the idea of it really, really got to me and I think it's something I will always remember.
When the parents sat around a table and one of the fathers said, "An angel is passing over" it was the first time I'd cried watching a film in my entire life. It's a french saying, "Un ange passe", it is said when a group of people suddenly go silent for no reason, and it is said at those moments an angel is passing from the room to heaven, and it was a beautiful, incomparably sad moment, but perfectly done.
A brilliant, brilliant bit of cinema.