I posted a thread a looooong time ago where I had the exact same experience. I could hear a very loud, crackling, static sound, as though the air was
charged with electricity.
I found the more I tried to sit up, the louder the crackling got. After an immense amount of effort I managed to sit right up, at which point I
noticed my physicaly body was still lying on the bed, yet I was sitting up, and looking around the room.
I could feel something very strong pushing against my chest, trying to force me back down onto the bed. Eventually this force overcame me and I was
basically slammed back into my body. I woke up trembling and covered in a cold sweat. I know I hadn't just had a nightmare, because my cat was in the
exact same place in the room as where I saw him during this experience. For the next 2months or so, a large, black....thing always stood at the end of
my bed or to the side and my cat was always very reluctant to enter my room, to the point of scratching at the door and mewing to be let out if I took
him in with me.
This thing was massive, it was almost the height of the room, and around 1.5 metres wide, with no discernible features. It definately wasn't a
shadow, because firstly there was nothing in the room that could cause such a large shadow, and it was blacker than anything I'd ever seen, like an
empty void, it's hard to describe the sense of ...nothingness.
I always sensed it before I saw it, because a feeling of dread would sweep over me everytime before it appeared. One night after a few weeks of having
this thing standing at the end of the bed freaking me out, I was in a particularly grumpy mood, and pretty much told it off, telling it to either tell
me what it wants or go away.
After that did my best to ignore it, not be afraid etc. Eventually this thing seemed to grow less menacing, less 'black'. I still see it on
occasion, but there's a good chance that at least 50% of the time I'm probably just looking at a shadow and letting my eyes play tricks on me.
That was my first and last OOBE. It scared the hell out of me and I'm not going to risk giving this 'thing' another chance to possibly do harm to
me.