Same. Laying very still triggered it for me.Yes and I'm pretty sure I have it. Used to happen more when I was a kid, like I'd shrink in to my bed, have to lie really still to trigger it. Happens less now but it still happens. Its never felt scary to me.
Never scared me but I think my son was terrified as he would have night terrors on top of it. He would be screaming for me and I’d be right beside him soothing him.