I've tried to watch 'Hostel' a couple of times, but I find it too unbearable. Blood & gore I can stand, but not the premise of some of it.. you're kidnapped, tied up & mutilated by guys wearing abbatoir gear while you're still awake.. then they bring a chainsaw out. Make it stop!!
I used to be a fan of James Patterson's books, but found them tough going in the same way - captors dissecting people while they're still alive & things like that.. maybe it's my imagination running away with me & doing all the work... it's possible that's what causes my squeamishness.
Anyway.. blood, gore, yeah okay - but when there's an intense psychological angle attached to it - I have to look away & block it out.
I know it's all fake - and some of it is utterly convincing - but there's a point for me where I can't just brush it off.