When I was that young I often experience such ... I can fly, I can walk on the water, zombie attack, a dead young girl approached me, an old lady... those were just few of my encounters from the other dimension.... my physical body struggling, until my father or any of my siblings around shaked my body to wake up.... the dead is the scariest one...flying? I enjoyed it.
RE: "I lay down in bed, suddenly my body froze, and I saw a dark entity in the room" – Sleep Paralysis explained