I'm not really prone to nightmares, so the most horrific dream I ever had wasn't very horrific at all. I guess I'll post it anyway. I dreamed that there was a red cyclops in our house and that he was able to heat up the air and choke our throats from far away without even touching us. It turns out I woke up and somehow the sheets had gotten pulled over my head, and I was actually suffocating. I was so weak from lack of oxygen that I was barely able to pull the sheets back and get a breath of air.
Actually, I know this is off-topic, but something that happened to me in real life was actually more terrifying than any dream I've had. I have a friend (I won't say his name) who is sometimes visited by a real-life demon, no lie. I first found this out during a sleepover with some other friends of mine, and the guy was there with us. Everyone had gone to sleep except me and that guy, and that's when the demon showed up. As we lay there talking, my friend suddenly went stiff and started twitching. I just thought he was having a temporary spasm, but then he stopped twitching and started whispering really low (He was talking to the demon, who is of course invisible). I asked him who he was talking to, and he said, "the Shadow." I said, "Who's that?" No answer; he just kept whispering. So I said, "Oh, I think I know what's going on. You want me to get rid of him for you?" "No, no, man, you do NOT want to piss him off, trust me." Like I said, the thing was invisible, but they can certainly be felt. At that point I felt like my blood had turned to lead, it had slowed down so much, and my heart beat slow and heavy. Then I felt something in the air above me, descending down on top of me. When it reached me, it felt like it was penetrating my whole body, felt like a cloud of electricity more than anything, but I had this really heavy feeling in my gut, I really don't know how to describe it, but I had never felt that before, yet I knew instantly it was a demon. Trust me, I wasn't hallucinating either. That feeling I tried to describe wasn't even really a physical feeling. It was deeper. So anyway, I'm lying there on the ground, and for some reason I can't move, or barely breathe, and my eyelids were twitching involuntarily. I tried to talk and tell the thing to go away, but I had no control over my mouth, or the rest of my body. It was no seizure; I was conscious the whole time too. Finally with great effort I opened my mouth and told the thing to let go of me and get out. Its grip loosened a bit, but it refused to leave until I told it at least twice more. I felt it withdraw quickly and leave the room, and my friend instantly relaxed and went to sleep. The thing came back just minutes later, though, and I think it was very angry at me for telling it to leave. But as soon as it came in I sat up and yelled at it to go away again. It came back once more a few minutes later, but it felt much weaker this time. I don't think they like being resisted like that. Finally, it stayed gone for the rest of the night. I wonder if that demon has bothered my friend again since then... Also, a couple weeks later I slept at another friend's house and had an encounter with a different demon. I knew it was a different one because the feeling I got from it was as distinct as a human personality, and I guess you could say it felt "higher-pitched" than the heavy, dark feeling I got from Shadow. This one didn't do much though. It just hung around for a few seconds until I said, "Go away, you're annoying me." I've had one more brief encounter with Shadow since then too, but not in the company of that friend I mentioned. I know it was Shadow, too, because it was the exact feeling I got when he was near me the first time. He came while I was alone, felt like he was expressing resentment towards me for the earlier incident. He stayed for a few seconds with that angry, resentful feeling hanging around the room, and then left. I haven't seen him or any of his cronies since then. I haven't had any more experiences like that for years. They don't bother me now. Sounds kinda weird, I know, but I'm not making any of this up, and it is hard to describe. I have a feeling not many people ever experience this.