The spinning feeling is exactly what I have experienced a few times (http://www.dreamviews.com/forum/viewtopic.php?t=27010) and I've done it a couple of times in bed too, but I end up getting excited and I lose the feeling.

I'm glad that this is at least not uncommon.

I'd like to try the rolling over technique when it next happens to me, but I hope I don't fall off as it's about a 4 foot drop to the floor, and would probably wake me up (if I was dreaming).