Sleep paralysis happen when you lay straight for at least 5 min.After that your shadow comes and sit on your chest,during that time you can't shout,move or do anything.the way to escape from sleep paralysis is to someone call your name between 5-6 min otherwise you are dead,or if you know how to escape from it on your own then thats fine.
yeah, is happened to me too, is scary in the first moment but now my brain recognizes the feeling and knows that soon i'll start to awake, move, talk.
And if that's the final feeling of the sleep death no one came back to tell us this...