Not to be confused with fantasy or the supernatural, the fantastic is in actuality its own beast and perhaps the most deeply frightening of all narrative modes. From Dracula and Nightmare on Elm Street, to Carrie and Them, the fantastic has become an ideal vehicle to denounce deep cultural dysfunctions that affect not only the way we understand reality, but also how we construct it. This work studies the various dimensions of the fantastic mode, examining the influences of iconic authors such as H.P. Lovecraft and Jean Ray, and addressing key narrations such as Guy de Maupasasant's The Horla and Jordan Peele's Get Out. It explains why the fantastic is not about ghosts or monsters, but about the incomprehensible sides of our own reality, and the terrifying unknown.