3D Blackness/What was that?

[GunsNRachel]

I'm confused. What is it? I've been trying to figure out what it is for a long time now, and I can't figure it out?

Also, I was just trying to astral project, and something odd happened. I had been laying down for about 30 minutes and my body felt like it was dumb, and almost cold. Then I started getting a high pitch sound in my ears, which kinda scared me and woke me up. What the heck was that? Is that a good thing?

[Blazewind]

I think that 3D blackness is pretty much what you would see, when all other imagines and light disappears.  all around you is nothing but pitch darkness.  The high pitched sound you could hear was more than likely a good thing.  Any unusual sound that you are not used to hearing will obviously do a fine job of scaring a person, but now that you are likely a little more accustomed to the sound, having heard it once now, you may be a little more prepared for it next time.