The Dark

Shadows stream into the room, pooling in the corners. Tendrils reach across the floor toward me, fading away as they approach the light. All is silent. No creaks, no footsteps, no wind, no life. Something flickers in the corner of my eye; I turn my head to see an empty room. There's nothing here. I am alone, but still the hair on my neck rises of its own accord as if something is watching. Was it always this cold in here, or did the temperature just drop?

But most important of all...

What happens if I turn off the light?