So late at night when I can't sleep, part of what happens it that my brain will get revving in directions I'd rather be doing in the day, but often the distractions of just being awake prevent my brain from revving like that when I can make use of it.

Over the course of the last week or two, this one particular one has popped back into my head a couple of times, and demanded that I do something with it... ( read more )