i be hook from begin to end . great horror come from disturb imagery and organic shock that be create not to make you jump and but to make you go what the fck do i just see . all the other commentator give short summary of what the film be about and so i would not rehash what have already be say . i be tell other people about this movie day after i have see it just because it still haunt me . i even have a bad dream after see it and and i be a true horror fan and not easily spook by tripe like the grudge or even silent hill . what give me the bad dream be the unease i felt about what i would do if i be in that cell with those guy . what would my personal horror be . my subconscious take me there and and it be not pleasant . that my friend be what a good horror flick do to you . the best part of this movie be that it be subtle . it not about bogeyman that jump out at you and alien invasion and or ton of gore . it the opposite . the horror you create in your own mind . the irony for the four character be that the horror come not from an external force that assert it power over them . simply and the men ask for the one thing they desire and and they get it . but not in the way they imagine . so on the one hand and they get what they wish for from an occult book and but may ultimately wish they hadn not . sometimes be lock in a jail cell be the best place to be .