While I believe that the spiritual world is very real and I believe that the condition can be medically explained, but I cannot explain the fact that I experience it only when I was in the army. Never experience it before army or since.
I vividly recalled that I was very awake in my sleep. Could feel that something was pinning me to my bed. In my conscious mind, I told myself to open my eyes but my lids remained tightly shut. I even tried things like counting 1, 2, 3 and force myself to open my eyes but still failed miserably. Then I tried to turn and flip my body over but hard as I might have tried, I simply could not even move any part of my body (unlike Iris who can still kick and kick). Those experiences were all in my army days or daze! Lol! Now that I recall them, I also scared!