First and foremost the initial title for lions gate film is adapted from the traditional lions gate logo. This due to the fact that the original logo is less suiting due to its white background. The Non - diegetic music/sfx's at this point are also very rough and grating giving connotations of stress and putting the audience on edge.
Behind the opening titles there are background titles their are sound effects, such as water drips, which build a sense of anticipation as he audience is yet to observe anything beyond black. The non diegetic soundtrack is very eery, with connotations of a tense stress. The darkness of the titles then flows subtly into the darkness of the film again building a sense of anticipations because several minutes have passed and there is still no obvious source of sound effects. When there are finally some visuals, the main features are a rusty drain, and blue light on a mans face, the former preludes the idea of the environment they will find themselves in, the latter connoting stress.
When the characters finally speak, their is a juxtaposition of the voices is clear, the first man is panicked, the second is calm, the immediate insinuation suggested is that the second voice is the captor.
It continues and is still exceptionally dark but there are very small details which can be made out, the reverberation. A chain rattle can be heard, again this creates suspense because the audience cant see the source of the sound effect.
Between the scenes of darkness where the light is at a minimum compared to the stunning light juxtapose and in a dark cinema where the titles and the long opening of darkness would have adjusted the audiences eyes to darkness. When they are hit by a sudden bright flash of light they would be largely disorientated. This disorientation in the audience mirrors that exhibited by the characters, this is further connoted by the shaking camera. The camera also blurs in and out of focus, which creates a sense of mystery and makes the audience apprehensive. The scenery connotes a forbidding sense with rusty pipes damaged tiles and broken pipes.
The camera effects continue to disorientate viewers, with a spiraling upward movement to force home the shock of the dead body that is now on the floor. The non diegetic soundtrack also becomes more frantic and sharp. Close ups are then done on a gun and on blood which are very easily associated with horror, but in-between is a tape player which seems out of place to the audience, this again is creating anticipation because its presenting the audience with further enigmas to the audience. At this point the characters realizes they are chained up at the same time and as the narrative is clearly restricted this is the first time the audience realize as well, the cutting becomes faster along with the non diegetics, this helps to convey the panic amongst the characters to the audience.
Furthermore its from the victims perspective, rather then the villains which helps to increase the anticipation and the fear amongst the audience, because they can sense the audiences terror.