Don't worry, it's a natural side effect of your brain.
Everyone experiences this.

No I get those hypnic jerks instead where your legs twitch

many a time, but it hasn't happened recently thankfully

Nope, I know my dad's had it a few times - sounds awful.

Nope. My husband has had it happen to him a few times. The first time he said it was a Rottweiler that landed on his chest and growled and barked at him menacingly. The second time he said it felt like a person was on top of him and he was screaming for me to help.

Ooo maybe it was a succubus, wanted to suck your soul out😉😄

It's happened to me many times, but I've never seen or felt demons or anything.

Only once, but it was simply frustrating. I'm sorry to hear that

Yes. It's a terrible feeling

Yes, like 10 years ago. That was the scariest experience ive ever had