 Sheila and the others use electrified fences and blowtorches to keep the creatures at bay, but it is revealed that McCabe, actually insane, has created the bats to be the ultimate predator, specifically designing them to kill humans.McCabe flees outside, falsely believing that he can control the bats, only to be killed.When Sheila, Emmett and Jimmy arrive at the mine the next morning, they are informed by the military that they weren't able to turn on the coolant unit, so the plan now is to bomb and gas the mine starting in one hour.