...Or Is It Just Me?

Picture this: You climb into your PJs and crawl into bed with a book. You've got some soothing background music playing on your stereo and your new reading light is just right for long stretches of textual intake. So you plow through the 60-70 pages of the slowest short story ever, but by about page 66, you pass out. Waking up the next morning, you find your reading light turned off, your sterero turned off, your book closed and on your bedside table, you safely tucked away under your covers, but your PJ shirt on the pillows next to you. Does this ever happen to you? It happened to me last night/this morning. Any explanations are welcome...mine has something to do with elves, though I'm not sure if they're the same ones that deal with my shoes...