 CONT: When Jack is in the mall and enters the room with the  ventilation controls, you see him go for the rightmost lever, in the  next shot he is pulling the lever to the left of that one, yet there  is not enough time for him to have moved on and you dont hear him  pull the lever down. In total there are 5 levers, we only hear 4,  though he starts with the rightmost one and finishes with the  leftmost one, we see him pull all the levers.