I always just figured (foggily) that I was half asleep when this happened to me. It can be pretty scary/frustrating being essentially paralysed even when you th

I always just figured (foggily) that I was half asleep when this happened to me. It can be pretty scary/frustrating being essentially paralysed even when you think you know what's going on. I think that sometimes in dreams you can transition from your 'dream' limbs (which you can control in the dream) to your real limbs (which you can't) which could explain a sudden inability to move in dreams.