That sleep paralysis shieet has folklore behind it in Korean history... I have that shit and my mom used to explain it to me as "Ka Wi Nulita" meaning kinda like "scissors pressing" or something of that sort.. Basically it goes like sum lady was murdered or sum shiet so she haunts us when we're JUST about to fall asleep or just about to wake up and she jumps on our chest to kill us. Shit is hella common for Koreans I dunno why.. but it's like sumtimes I'll wake up and I want to move but I cant get up. I'll want to cry out but I can't speak. And then I can't breathe and I see sum old ass lady draped in long white clothes on my chest and I close my eyes and wait. Anybody seen the Japanese version of the Ring??? Lady looks like that. A few minutes later I can move my fingers and it's over but it's a pretty uncomfortable experience, especially when I was younger.