Corrected entry: What is the power source in the underground bunker where most of the action takes place? Given the number of lights it can hardly be a battery and it's unlikely to be a generator.
Corrected entry: Liz's version of events to the police psychiatrist don't actually make any sense. She claims that after being locked in the bunker by Martin, her and the three others managed to escape completely unharmed, and he is subsequently charged. Yet surely they should realise that her whole story is nothing but a lie, given that they have cordoned off the site and discovered three dead bodies. How can they believe a story that indicates that no one has died, when they have a trio of corpses in the morgue?
Corrected entry: Throughout the movie, when the hatch is seen from the outside it is vertical (perpendicular to the ground), but when viewed from inside the hole, it is horizontal (parallel to the ground).
Corrected entry: Men grow stubble about 3 days after they shave, but the 2 men were traped in the "hole" for 18 days. Don't you think that they would have a lot of facial hair by now?
Corrected entry: At the beginning, the police suspects the guy with the glasses, although he was out of the country in the critical period. The police knew that the girl (the psychopath) had managed to come out of the hole. How then could they suspect the guy with the glasses, since either he would have had to let her out (which was not possible- since he was not in the country at that time) or she would have needed to have the key. Or how else could she have come out?