I think it is something to do with the cover of darkness...Thoughts get channeled through something, I can only descibe as fluorescent light. Bizarre idea!
It makes sense, doesn't it?
Without really processing any conscious ideas. Your mind takes control of itself. As if electricity from outer-space is forming a current, and your mind just switch on. Your not really thinking. Or paying any attention, but still shit is happening.
Just let it go. The mind knows what it wants.
The best work usually gets done, if thats the case.