What causes people to be scared of the unknown? Most often, it is that which can’t be seen that is the most terrifying. The imagination, it seems, is capable of conjuring images that are far worse than anything real could ever be. The best horror films are the ones that capitalize on the reactions people have to the things that are beyond their scope, be it something from another world, or, as in the case of Jaws, something that lies just below the ocean’s surface.