After 19 years, I finally have a place where I can ask this question! (thank you, internet). First, let me give you a bit of my dreaming history. Since I was a teenager, I've had dreams where I could move stuff with my mind, and that I could levitate or fly. In these dreams, I never actually realized that I was dreaming. In my dreams, I always thought it was real. So I'm not a stranger to this type of dreaming.
But one night, when I was 17, I had a dream (?) that I was laying in my bed, on my back, looking up toward the ceiling. But I wasn't looking at the ceiling, I was looking at these "beings" floating directly above me. Even now, 18 years later, I can still recall that these things were transparent, several of them, all in a line from left to right. They were saying words to me that I've never heard before, and each word would echo away, like the delay effect that an electric guitarist would use. Of the words they were saying to me, I do remember one, the name "Horace". The next morning, I woke up, thought to myself, "hmm, that was a wierd dream", and thought nothing more of it.
Two weeks later, I was over at a friend's house playing darts. He was playing music I never heard before, which I found out was a tape of ELO. Anyway, at the end of a certain song was the EXACT same echoy "Horace...Horace...Horace...(fade away)" that I had heard in my dream two weeks earlier! The moment I heard it a shockwave of icy chill ran through my body.
1 1/2 years later, I was looking at album covers, when I came across an album cover that had a drawing of a guy in bed with spirits floating above him. "Wow," I thought, "That happened to me!" The album was Black Sabbath's 'Sabbath Bloody Sabbath'.
So you can see why I'm curious about this. To add to the mystery, about 9 years ago I was in a relationship with a woman who worked with troubled teens. One night, we were in bed talking about intimate things about ourselves. And since we were together for about a year at that point, I felt comfortable enough to tell her about this experience. She was really surprised, and when I asked why, she went on to tell me about this teen that she worked with at one time. He experienced the same thing. Not the album cover and stuff, but the floating "things" above his bed.

Thats it.

So if anyone has any info, thoughts, opinions, guesses, or anything about this, please post!