Funny thing happened to me today when I took a nap...

I ended up immediately having dreams. And not just one... six of them. I woke up betwen some of them. Two were lucid. I'm not sure whether some of the last four dreams mightn't have been part of the same dream; but I got up to use the bathroom between two of them, so I know there were at least four dreams (two lucid and two non-lucid). And the subject matter changes drastically from one dream to the next--from torture to a peaceful dream about shopping!

I'm not sure how this is logistically possible-- I mean, there can't be time for more than one REM period during a one-and-a-half hour nap, can there?

The full Dream Journal account of the event

Any ideas? I've always been a rather prolific dreamer, but this is ridiculous.