You’re in the middle of a beautiful forest. The gentle sunlight is filtering through the canopy, dappling the forest floor as you meander happily along the path. You take a deep breath and take in the heady, pinescented air. Suddenly the air turns cold and dark clouds obscure the sun so you can hardly make out the path in front of you. You stumble, a strange, otherworldly mournful keening fills the air as the hairs on the back of your neck stand on end.