I never knew the term until now. I used to have that experience too. Then, I couldn’t move though half conscious in my sleep. It will appear as if something is pressing & squeezing life out of me. I can’t even scream or call my wife attention to it.
Eventually, I learn to quietly repeatedly call on Jesus Christ, my Savior, in my mind during those scary times. And eventually, I get free & totally conscious.
Though less common with me these days, I know what to do when such an attack sets in.
Thanks for the other insights.