The chicken run (2015)

For Crissy, waking up was the beginning of the nightmare, discovering her hands and feet bound, her body drenched in sweat from the brutal Texas heat and her brother Bobby, clinging to life, impaled on a nearby meat hook. These were the 'visible clues' to horror that lay ahead, the 'audio clue' was the growing sound of a revving chainsaw getting louder and louder, closer and closer, only hinting at the terrifying fate and formidable aggressor on the other side of the ominous, gleaming metal door of the room in which she was trapped... and then the door opened.