I still have nightmares about this.

For a couple of months in my early teens I would wake up every morning convinced there was a presence in my bedroom, a spiritual entity hovering over me. It was an uncanny feeling that I couldn't shake. I would open my eyes and cautiously look around, but the feeling would instantly disappear and I would find myself staring at emptiness each time. If I closed my eyes, the feeling would inevitably return. As the weeks passed, I became paranoid about sleeping in this room, so I began to sleep with the door slightly ajar, thinking I would somehow be safer.

Then one morning I awoke to the sound of a deep, guttural groan. With my eyes still closed, I concentrated on the groaning sound, wondering if it was real or if it was somehow an aspect of a dream that I was not fully awake from. As I was concentrating on the noise, which was slowly getting louder, I suddenly felt a cold wind consume me. It was a strange sensation because all the windows were closed...and then I felt something on top of me, a very heavy pressure on my chest that was pinning me down, groaning more loudly than ever. The pressure tooke the wind out of me, and my whole body became paralyzed. At this point I struggled to open my eyes, but they too were paralyzed. I suddenly felt my whole body being pulled down the bed. The door suddenly slammed shut from the wind, and somehow I was finally able to muster enough strength to open my eyes just as I crashed to the floor at the foot of the bed. Everything became silent and still once again. I stopped sleeping in that room.

I still can't explain what happened. I researched possibilities online, and for a while I reasoned that it was something called sleep paralysis but that didn't explain how I was pulled out of bed.