Not exactly the same, but I've gone through sleep paralysis 4 or 5 times in the last 10 years and it remains one of the most terrifying things I've experienced. It happened upon waking up from a short nap, and always while I was on my back (I usually sleep on my stomach or side at night).
The first time I went through it I had no idea what was going on and for the ~60 seconds that it lasted I went from thinking if this was really happening to whether I would be able to tell my family I loved them again. The subsequent 3 or 4 times I experienced it (after extensive research following the first episode) I repeated the thought that this was temporary and would go away soon forcefully until it in fact did after 60-90 seconds.
I know this is an evolutionary defense mechanism our brain/brain stem have developed over time, but wow is it awful if you ever go through it.
The first time I went through it I had no idea what was going on and for the ~60 seconds that it lasted I went from thinking if this was really happening to whether I would be able to tell my family I loved them again. The subsequent 3 or 4 times I experienced it (after extensive research following the first episode) I repeated the thought that this was temporary and would go away soon forcefully until it in fact did after 60-90 seconds.
I know this is an evolutionary defense mechanism our brain/brain stem have developed over time, but wow is it awful if you ever go through it.