Plot hole: When the military says they're going in, they ask how Billy got off campus through a pipe. Earlier when Billy goes through the pipe he's immediately met by two soldiers in ghillie suits. You mean to tell me the soldiers that meet Billy wouldn't know how to get through a pipe? The military is incompetent in this film but come on.
Plot hole: After Cali's father is killed the decision is made to cut power to the school so he or his men don't find out about his father. But if power was cut to the school then what is powering all the machinery in the kitchen that's providing food for 90 students?
