This encounter happened in an old B&B in the Old Town section of Edinburgh, Scotland. I lived in Scotland, about an hour and a half north of Edinburgh, for about 3 1/2 years (Summer 07 to sometime in 2010). Once while living there my aunt came to visit and we thought it'd be fun to spend the weekend (2D/1N) in Edinburgh.
The one night we spent in the old B&B was a strange one (I do recommend the place though, the people/staff were wonderful). I think it was the Broughton Hotel. We were sharing a large bed in what I think was the top floor, as if they'd converted the attic into a room. It had that oddly shaped ceiling. Anyway, everything was great until I woke up partway through the night, sometime in the wee hours of the morning. It was almost pitch black in the room but even though I could not see anything/one, I could feel as if something was staring at me. Hard. And not necessarily nicely. I decided to try and mentally block myself off from it and create a barrier in my mind. I imagined a protective bubble sealing my aunt and I off from this being, if there actually was one.
Well, that pissed it off. I felt it stride up on me and even though my eyes were closed, I could feel it getting right up in my face. Then it happened. I couldn't move. It was completely pinning my entire body down into the bed. I tried to touch my aunt right next to me but couldn't. I tried to scream to get her attention but all I could manage was a squeak. Eventually it must have been satisfied because it released me. I curled up into a ball and started praying. At some point I no longer felt its presence and I fell asleep from exhaustion but slept horribly.