I had a few. First one was extremely frightening, I could feel my heart trembling.
I'd read about it on the internet afterwards.
Afterwards I'd cope with it, by placing myself in the fear, accepting the darkness.
I recently had another sleep paralysis. I had an initial fearful reaction, but then I was like "oh, here we go... awesome!". I remember using my hands to cast "spells of darkness", I was trolling with my situation in a way. Was heck of a fun, would do again! (though not necessary, lol)