These are true events, I have had several strange experiences in my life most of them from when I was a teen growing up. These occurances started after I had moved to my families newly built home. Back then I didn't really believe in any of this stuff until it started to happen to me. Unfortunately I don't remember all of them but the ones that I do remember I'm going to tell you.
I don't know if its paranormal or if its something wrong with me but this has happened several times. This ussually happens when I finaly fall asleep. After falling asleep I go into these nightmares and when it gets to a certain point in the nightmare I try to wake up but it feels as if there is an over whieght person on top of me compressing me and preventing me from waking up at all. It almost feels as minutes had just passed by before I was able to move and open my eyes again, and when I finaly could there was no one in my bedroom. I sleep with my door locked so if this helps with anything. I just don't know what it was.
Here is the most freakist thing that happened to me.
Once again it was at night and as always I sleep with my door locked and my window is always locked and shades and curtains are always closed.
I was having a difficult time falling asleep one night so I was trying to keep myself busy and entertained with random things around my room until eventually I got tired enough to be able to fall asleep. It was somewhere around midnight maybe after when I finaly went under, I was half asleep/awake when I heard a deep male voice wisper into my ear (silently he whispers a silent death) which woke me up completely causing me to panick. Once again there was no one in my bedroom. After that I was too scared to fall back to sleep.
I honestly do not know what that saying even means and/or where it even comes from.
I've been coming to this site for a week or 2 and its this post that compelled me to finally take the plunge and sign up. I can very much identify with your post as I too have had quite a few weird experiences related to sleep, or that "twilight zone" (if you like) between sleep and awake. I can't say I've had the feeling of someone lying on top of me stopping me from moving, but I've had lots of moments where it seems like I'm awake but something is not right and find myself trying to force myself out of whatever is happening to me at that moment when I'm obviously at the point of sleeping. Its pretty hard to explain but I'm sure many know what I mean. One such experience I remember was not too long back, a few months maybe. I was lying in my bedroom, I always sleep either on my stomach or on my side, never on my back. On this occasion I was on my side with my eyes open, extremely tired and stressed and staring at my room. The room I was staring at tho wasn't my bedroom although I wasn't aware that it wasn't my bedroom at that point. It was a room similar to my bedroom, the bed I was lying in was in the same position as my own bedroom, the door in the same place, but the difference was the colour of the room and the fact that there was hardly anything in it if my memory serves. There was what appeared to be a red bed on the opposite wall and the room appeared to be red (again, if my memory serves) I saw all of this in the space of about 3 seconds and although it felt like I was awake, I knew something didn't feel right and at the point started to "pull myself out of it". Your analogy of someone lying on top of you did make sense, but the best analogy I can come up with is being tied up from the shoulders down to your ankles and trying to free yourself with the only thing you can move to achieve this is your head. Its definitely weird and sometimes scary. What others have given as a possible explanation makes sense but I always wonder to myself if these are moments where you are about to sleep-walk or something.