I woke up in the middle of the night feeling more tired than I had when I went to bed -- my comment to tigerphoenix, which was also (sadly) the first thought through my mind when I woke up, was that I felt like I'd tried to raid sleep, wiped, and had nothing to show for it but a repair bill.

But then I slept like the dead for the remaining two hours allotted to me, so I am surviving the day.