Hypnagogia

so i think i experienced a version of this, its mild and i dare say i want to learn to control it because its scary.
i'll briefly explain what hypnagogia means first.

the hypnagogic state is a strange phenomena that occurs at the onset of sleep. it induces visions, voices, insights and peculiar sensations as you sail through the borderland state. people are commonly used to seeing the familiar faces, landscapes or merely geometric shapes dance across the visual field at night. many would assume that it is merely the adjustment of your eyes to darkness/ low light conditions. with focus however, these complex patterns can be manipulated at will, e.g. focusing on a single shape within a pattern you may zoom in, discover more shapes, or look around the area, rotate or change the shapes, etc.

i can definitely say that i've experienced the geometric shapes previously - as i could quite give an elaborate description of it. the experience is actually quite similar to meditating and gives the brain a sense of clarity and focus away from the worries of the day. it basically helps you get to sleep.

while i was sick however, i didn't merely experience muscle pains and aches associated with the onset of the flu through the night. i experienced a sense of paralysis accompanied by strange repetitive (abstract) noises which to me sounded like blood flowing through arteries.
the scary part was that my mind was conscious, i was aware that i was asleep, or wanted to sleep because i was sick and wanted to get better. i couldn't will my fingers to move, or lift my arm, or even roll over. gravity had me pinned in place. i couldn't wake up either, or more precisely open my eyes - an effect which gave me unnecessary anxiety.

i don't think i have sleep apnea because the sleep paralysis was brief, and this sleep paralysis followed my episode of hypothermia (same night i had the flu symptoms) and it was probably brought on by my severe headache.

i didn't think much of it until it happened again 2 nights later (my flu was way into full swing by then). the second time round it was pretty much the same experience, but briefer because i knew what it was, and so i wasn't in panic.

to finally open your eyes from sleep paralysis brings relief. the moment you will your eyes open, the sensory stimulation of paralysis and noise depletes.
to stop this from giving me a scare i want to learn to control this, tackle it better.. i want to stop the paralysis from the beginning, and for some reason i think it may have something to do with the amount of oxygen reaching the brain, in addition to strengthening the muscles around the chest area. low oxygen = paralysis... if that makes sense?

so to me thats another reason to work out.. i think it would help in more than one way in my life.