Happy birthday!
And there are tales of a great variety of creatures coming to attack people in sleep paralysis. They are usually parts of a dark subconscious led by the negative feelings of being entrapped in your own immobile body on your place of rest.
Some have said that they were visited by Simpson characters, for example, or distorted family members. It's really scary, but they have also found out that there are ways to pacify these dream characters through faithful expectation of their good will. If you believe that they are coming to help you, they probably will, is what I read.
Sleep paralysis is a pretty interesting phenomenon, but I'm not yearning to have it any time soon.
Thank you very much, interesting information, this paralysis is also considered by studies beyond the explanations of science, with astral travel, and the true mental power of the hypothalamus :)