What do you think sleep paralysis really is?

Do you believe in the scientific explanation, that it's only your body asleep while your mind is awake?

Or do you think it's something more sinister or supernatural?

I had an instance whilst lying with my boyfriend. We were both in full conversation when he suddenly froze in place. A few several moments later, and he said he heard footsteps approaching, and he couldn't move and part of his body. He claimed not to be able to hear me, as if I was very distant or warped. This was the only time I can recall ever witnessing anyone fully awake while enduring this. I had no idea it had even happened to him.