I&#x27;ve had something that might be classified as sleep paralysis.  It&#x27;s horrible, but in my case it is easily explained.  The cat slept on my bed.  I would try to roll over in the night, but be unable to because the cat was on top of the blanket in the wrong direction.  (And, because I was asleep, I wasn&#x27;t moving forcefully enough to make her move.)  But when I kept trying, the cat would eventually move, or I would wake up enough to put some force into my efforts.<p>Once the cat died, I quit having that experience.  The new cat isn&#x27;t allowed in the bedroom at night (nor much during the day).<p>Note:  I am not claiming that this is the source of other sleep paralysis experiences.