Usually I don't have many dreams, certainly ones I can remember after waking up. Nightmares are even rarer. But this one really stood out because it wasn't a typical adult nightmare (like having no money or general everyday grievances); no, this was solidly in the realm of supernatural horror, like something from SCP or the works of HP Lovecraft. And it was scary as hell. I was in a room, sitting or standing with my back turned against the wall. I looked straight up, and I saw this torso with a white mask or a face, shrouded in black, sticking out of the wall near the ceiling. It didn't have any distinct arms to speak of. I tried to scream - but no sound came out, all I could do was wheeze, and as if I was paralyzed in that position, that...thing...was suddenly right above me, holding something above my mouth. At first I thought it was a knife with a fancy handle because of it's shape, but then I realized that the "blade" was actually a stream of some kind of thick, black fluid, like tar or something, and this thing was pouring it into my mouth. Then I woke up. Except that I didn't; I was still in the dream. I thought to myself, "next time I'll be ready". And I experienced a second such an "attack" but this time, using some Nightmare on Elm Street logic, I managed to grab that thing it was holding and bring it with me into "reality" as I woke up; inspecting it in what looked like a typical US police station from movies and TV, I noticed that it was not any type of container but simply a solid hunk of plastic or something, leaving me wondering where the fluid came out. This time I woke up for real, awakened by the alarm - but I was so tired that I simply shut it off and fell asleep again, and had another dream...sitting by myself in a toilet, thinking what a lousy place for such an "attack" this would be. And then it happened again. After that I woke up for real and didn't go back to sleep, and I was a bit shaken up for a while afterwards. Like I said, this dream was very unusual and I will probably never forget it.