This happened to me a few years ago; I posted to a site once asking for help but didn't get a solid response.
Ok, So in High School, my mom went away for a vacation so I ended up sleeping in her bed for a few days, one night my brother's had some friends over, pretty normal, nothing really going on, they ended up passing out in the living room I went to my mothers room and fell asleep. I woke up to some movement at the bottom of the bed, we had 2 cats so I thought it was that, I looked down to my feet to see what he was doing and crouched down right at the bottom of the bed petting my cat was a black figure, basically just a shadow. I got SO scared, I sat straight up and pulled my legs up away from it and just couldn't take my eyes off of it.
It then noticed I guess and stood straight up, it was pretty tall, the TV behind it was shining and I could see through it a bit and I tried to see the face but there was nothing, a blank face, just all black, like a shadow.
So this is where it got freaky, for me at least!
The figure then turned and was gone out of the room in a split second, I got up, remembering that there were other people in the house, so I went out through the dining room to look into the living room, everyone was there, fast asleep.
I turned my head to the right and saw into the kitchen, the black figure was standing right in the corner of the kitchen, so I walked into the doorway and just looked at it, we just stood there like that for maybe 15-20 seconds, but it felt like forever, then all of a sudden it started coming near me and just as it got a few inches away from me it turned down the hallway, stopped for a second then was gone, out the door...
It has puzzled me for the longest time what this was?!
It gives me the worst chills whenever I think of it.
Ever since then it has always felt like someone is near me, or watching when I'm laying in bed or in a really dark room.
It's incredibly scary sometimes.
If anyone has any bit of info that would help, it would be greatly appreciated!