Have you ever thought about sleep? Not the act of sleeping itself, when you're so far gone that not even the apocalypse can wake you, but the moment of falling asleep. Does it scare you that you can't remember it? It terrifies me.
Every night it's the same old thing, a cold bed waiting to be warmed by you, two blankets and a sheet, a fluffed up pillow, and the darkness which settles over you as securely as if it were molded to fit your body. Perhaps for a little while you lay there in the dark, conjuring images of a life you're sure to never live, but slowly, without the slightest acknowledgment in your mind of it, you start to fall asleep. Where, between consciously making up fantasies in your head and dreaming, does your mind stop letting you be aware of the world? One moment you're in a city far away, the next you're as unconscious as the dead.
To willingly be unaware of our surroundings, that is what sleep is. To really not know the beginning sleep and the end of waking, that is the most terrifying feeling of all. That place between sleep and awake, it's the place that will haunt you when you're lying in your bed, thinking about the way you'll soon be in oblivion, without quite knowing how you got there.