I've occasionally seen things (years ago) that, when I reported them to friends, apparently, were fairly common.
Among other things, what I saw qualifies as a bedroom visitation and not a shadow person (the corporally challenged thing is really funny--and may be appropriate) or a ghost, but I'll let you make up your mind.
One night I was awakened out of a sound sleep (twenty years ago?) in the middle of the night by a large, black amorphous mass directly to my right. I could tell it was evil and intelligent. It was like a huge, black amoeba. It was so black, I could see it because it was darker than the night around it.
I was, needless to say, terrified. I would have had to go through whatever this was to get to the light switch, so I got off the end of the bed, felt my way around the room, and flipped on the light switch, which banished it or otherwise made it go away. I don't remember whether I slept again that night.
When I told the guitarist in my band at the time, not only did he know what it was, because he'd seen it before, but one day when we came back to put his guitar away in his closet from going out for coffee, there was a smaller version of one of these things in his closet, and when he pointed it out to me, I could see it.
We left, and went back to the coffee shop. He explained that he saw these things throughout his life all the time, and they obviously bothered him.
He had strange dreams at night where he was a Vlad Tepes type character, decapitating people in a battlefield war, one after the other, and he felt this was a past life. He believed that these things had something to do with his karma in the reincarnation sense, that because of the atrocities and horrors he'd committed in a past life, these things were gathering, waiting for him.
I haven't heard from him since.
Has anyone else encountered one of these beings?