What is sleep paralysis? Any experiences?

Has anyone had sleep paralysis?

I’ve had a few, they are super scary.

I use to get them when I was younger, I remember laying down, trying to move and scream. And nothing, you can feel the tension you are completely aware; you can feel and hear everything in real time. You feel trapped.

After being scared of it I read things on it and learned how to get in to that state on my own, it was more to comfort the fear and try to take the power from it, I haven’t done it in some time because it’s still super creepy. But I mostly stopped because I did feel that it didn’t seem healthy. Also, I haven’t had it organically in quite some time.I’ve read different opinions on this, some say it’s spiritual others have a more physiological approach to it. I know many people here come from different backgrounds religious cultural. What do you make of it. I don’t like messing with things like that. I was just curious to know if others have had this or what the general understanding is and where it comes from.