Living Patients", are the most apparent instances of supernatural phenomena (alongside poltergeists and other spectral entities) that occur within the abandoned Riverview Hospital
throughout Grave Encounters and Grave Encounters 2. Unlike other poltergeists or ghosts that occur throughout the films, they most often appear as corporeal apparitions of the departed patients and personnel of Riverwood, still wearing hospital gowns and all, with ghostly white skin and emaciated bodies showing various forms of physical disfigurement with some being barely recognizable as humanoid and yet still some not visible at all. The Demons ruthlessly attack any living person who enters Riverview until they've been killed or driven to madness.