I tend to rotate like a convenience store hot dog in my sleep. The upside is that, with my patented copper wire pajamas, I can generate electricity this way. The downside is that I am accused of "stealing" (liberating!) the covers.
Because of a surprise ice-storm-related houseguest, we've sleeping on an air mattress lately. I'll admit that it was impressive that the bedding all ended up on my side, given that we were in a sleeping bag.
@peterdrake Nice to know I'm not the only one who does this :)