I've had some dreams where I know I've been dreaming. but by far the oddest thing which has happened. is that a dreams ended and I've gone to open my eyes but can't and I realised I had some form of full conciousness in my brain but my body was still really asleep. I couldn't move any part of my body, so I like tried to move any muscles I could and started to wiggle my toes (at the time I thought I was paralysed) and I gradually got my body awake.