I've never seen someone miss sleep paralysis before. I get it, but the hallucinations that people describe never happen to me. I just become aware that I'm about to wake up, but I can't yet control my body or even breathing. I always know not to panic, yet I always panic and try desperately to start moving. I can always see the room, but it's a dream version because my eyes aren't really open and it looks different once I'm truly awake.
I don't have much sleep weirdness, but when I'm about to fall asleep, I frequently imagine 3D object spinning and rapidly changing size. Kinda like the 3D TempleOS sprites [1], but 5x faster and increasing/decreasing size at the same rate.
Mine was always accompanied by the sensation of being watched. I could 'see' where the watching was happening, but not the actual thing watching me.
Also always accompanied by fear.
I believe sensation of a presence in the room is very common in sleep paralysis.
Interestingly the belief of what the presence is has changed with culture. It used to be demons, now it is more likely to be aliens.