A couple of things ---
I've posted before about this strange phenomenon that has happened to me: I'll be reading in bed and sort of nod off and then suddenly snap to. But in the brief period between nodding off and snapping to, the novel has continued to "play" in my head. I then realize that what I
think I've been reading has little connection with what is actually on the page!
Also, when I read in bed at night I make sure that I'm not holding my Sony directly over my head or off the edge of the bed. My Palm Tungsten got a nice ding on the display when it tumbled out of my comatose hands and into the corner of my bedside stand. Luckily, I've yet to poke my eye out with the diving edge of my Sony Reader cover!
Tim