In the first FNAF novel, it's revealed that Dave Miller's entire body is covered in scars from an old spring lock accident. While his description of dying inside a spring lock suit seems to be narrated from personal experience, the events that caused him to fall victim to this gruesome fate are unknown. It's implied that Henry Emily may have been responsible, but the details of the accident are never revealed. Unfortunately, it’s also unclear how William survived this first spring lock accident—as well as the second, which Charlie and her friends witnessed in the first novel. He appeared to be long dead inside the animatronic when Charlie discovered his body under the stage in the second novel, yet he still managed to return not once, but twice afterwards. Despite the fact that his body progressively deteriorates over the course of the trilogy, William Afton manages to cheat death time and time again, perhaps becoming somewhat supernatural himself through his horrible creations.