I don't purposely sleep on my back because of sleep paralysis, night terrors, and sleep apnea.
Whoah! Now I'm definitely not doing it (then again, I doubt those happen all the time).
You know what's been troubling my dreams a few times in the last year or so? Myself. I probably mentioned this before, but I've had at least three incidents where I've done crazy stuff in my sleep. You see, there's these two mechanisms in your brain that kick into action whenever you sleep. One makes you not move, one keeps you asleep. If the latter drops the ball, you may be temporarily paralyzed (like Luigison said) or see parts of your dream around you when you wake up (a phenomenon many point to as the explanation for accounts of late-night alien abductions. But if the former doesn't do its job right, you can sleepwalk--or worse. The first time this... "thing" happened to me, I was in a hotel in India. Now, this may have been a side-effect of medication I had taken earlier (it supposedly had the side-effect of mild hallucinations--my mom saw people with guns standing in her room), but in my sleep, I spontaneously got up and started shaking my brother in the neighboring bed while groaning (in my dream-state, I remember that I wasn't trying to hurt him. I was trying to wake him to help me because something was trying to "get" me). The second time was several months later at home. Now, my memory of the occasion is obviously somewhat blurry, but I think I was screaming and tried to run down the hall. However, my legs were rubbery and I fell down. And just a couple weeks ago, I sleep-sorted through my bookshelf under the assumption that something had crawled into it. I figured it had just been a vivid dream until I saw a section of books on the shelf pushed in that afternoon.
Man, this is starting to turn into the "Whacko Dreams" thread...
Poll
