I remember also
One time I was in some white space without any borders, walls or something, just white light everywhere and I could not do anything with it. I understood that this is my sleep paralysis, I have lucid dream again or probably I died. So if it's sleep paralysis or dream I can try return back into my body as I did it few times already but nothing happened. I started panicking that I died but after few time I opened my "physical" eyes.
Another time I had sleep paralysis I tried to move my hands and legs. It was impossible at first but soon I understood that I really can move them, I have physical feeling of moving them and I also saw them, they looked ghostly and also moved like ropes, or snakes, without joints.
One time sleep paralysis was so annoying that I had them almost every night. After I stopped smoking cigarettes this shit ended.