horror film be a curious thing and sometimes they manage to stumble across a formula that work very well and sometimes they try valiantly to tell a worthy story despite time and budget problem and sometimes theyre so bad theyre actually kinda fun . and sometimes theyre the cavern . a good horror or suspense film should contain vagary that keep you guess and they should allow you to be interested in the character and their motivation so that you actually have some sort of reaction when they die . however and the cavern chooses instead to introduce element that work at first and only to be negate by it own lackluster storytelling . all the character be completely forgettable and any actual back story that might make any of them even remotely interesting be blurt out within a 30 second monologue and make it impossible to do anything more than laugh a character be pick off almost at random and on more than one occasion in the least possibly frighten way . ( to spoil a scene a bit and one victim be take during a complete blackout which might have be a little frightening if the sound effect use to indicate his kill wasn not reminiscent of stir a pot of too thick macaroni and cheese ) add to this formula the camera that work make me think the director saw one too many nine inch nail video and an end which in an attempt to be shock serf almost no purpose but to annoy and confuse the viewer and you have an almost completely unwatchable horror film that fail on every level . i will be honest with you and if you want a claustrophobic caving horror movie go watch the descent and and i feel weird say that because i do not particularly enjoy that movie either .