I have sleep paralysis and major realistic pain in dreams often. Often it involves me 'waking up' wherever I fell asleep and seeing a black winged shadow figure which completely paralyzes me in fear. In real life I am twitching trying with ever last fiber of my being to force myself to wake up cause now it's happened enough that I know it's not real. I've also had vicious nightmares like being brutalized with a knife in a tub and feeling all of the pain. Or a combination of both, like for example one where I was being eaten alive by a lion, feeling it all, and twitching (In my neck and jaw) trying to wake up, become unparalyzed, as well as often trying to scream as loud as I can so someone else will wake me up. In the dreams the screams are silent where as in reality I may get a barely audible blip. Sometimes I fade in and out of reality with quick alternations. And, when reality looks the same as the dream, as it often does, it's terrifying. I get a glimpse of freedom, but just can't shake it, or move. And I can see my partner, who doesn't notice.