The faceless Watcher in the smoke

"I was doing something ordinary, nothing strange at all. The room felt normal, the light was normal, and I wasn't thinking about anything in particular. Then it was simply there. It didn't creep in or walk toward me. It appeared in the same spot, as if it had been waiting the whole time. It was squatting low to the ground, in a posture that looked wrong and unnatural, like no person should be able to hold it. It had no face. Its body was black smoke, like a shadow made of mist or a dark genie, yet it still had a shape. Where a face should have been, two white eyes glowed in the darkness, cold and unhuman. Its hands were white too, drawn out of smoke, there but not fully solid. It didn't move. It just stayed crouched, watching me, and I couldn't look away. When I woke up, my heart was pounding, and the image of the white eyes was burned into my mind. I lay still, checking the corners of the room, and the uneasy feeling stayed with me for a long while."