You can skip this if you want to since it is not a part of the story just for the explanation of the type of horror involved in the story.

The old "fight or flight" reaction of our evolutionary heritage once played a major role in the life of every human. Our ancestors lived and died by it. Then someone invented the fascinating game of civilization, and things began to calm down. Development pushed wilderness back from settled lands. War, crime, and other forms of social violence came with civilization and humans started preying on each other, but by and large daily life calmed down. We began to feel restless, to feel something missing: the excitement of living on the edge, the tension between hunter and hunted. So we told each other stories through the long, dark nights...when the fires burned low, we did our best to scare the daylights out of each other. The rush of adrenaline feels good. Our hearts pound, our breath quickens, and we can imagine ourselves on the edge. Yet we also appreciate the insightful aspects of horror. Sometimes a story intends to shock and disgust, but the best horror intends to rattle our cages and shake us out of our complacency. It makes us think, forces us to confront ideas we might rather ignore, and challenges preconceptions of all kinds. Horror reminds us that the world is not always as safe as it seems, which exercises our mental muscles and reminds us to keep a little healthy caution close at hand.