I had a dream last night and thought of this thread. In my dream I was watching a car, and it flipped over and rolled multiple times. It was like a movie scene and I could see every aspect of the car as it moved. But when I try to do this awake, it is really hard (and I'm fairly poor with visual spatial ability in general). Makes me wonder about different parts of the brain being activated during sleep. Most of my dreams are very vivid with a lot of visual detail that I don't have awake.