[Cipher7071]

I think this is pretty much the same phenomenon as when you're working on an important paper, or anything else where you've spent a lot of time and effort on trying to solve a problem. Several times I have gone to bed thinking about a problem only to wake up with an answer.

It also reminds me of certain repetitive jobs that I've had. It sometimes seemed that I never left work because I would end up dreaming about the job at night. One summer many years ago I had a summer job folding and packing swimming pool covers... talk about some restless nights.