Not really a sleep paralysis, but like years ago when i was a kid, I was actually awake and I felt very weird, like someone was trying to possess my body. It felt like I was not even alive, it was like I was crushed between closing walls but still alive. I could move but all I could do was rolling around my bed. I could not scream for help. I still remember how the ceiling looked like at the time. It was very creepy. I also could not remember how it ended. I just woke up the next morning I guess. Now I am sitting in the same room when that happened

But lucky me it only happened once.