the concept doesn't miss anything.the team leader's way of making people agree with him(along with the support of his brother) and how paradoxical the path to escape are what i remember scene by scene-the emphasis definitely gets to the audience.however,when the team is being chased by the demonic looking creatures,it looks way too shaky to follow,making it almost impossible to look at the screen because you can't see anything clearly.other than that,since 'beneath hell lied the cave' i expected to see more of those 'bad guys',after all they've been there for centuries supposedly without disturbances from the outside world. overall it's an exciting movie and i had a really good time watching it.