Harry Potter Hangover

I woke up at two am with the worst headache I've had in a long time. It was the headache that woke me, even, which doesn't happen to me often. I got up and wandered the house and snagged some painkiller... and reflected that the headache was almost certainly a result of spending all day yesterday reading Harry Potter.

After about an hour I felt the pain lessen and went back to bed.

I had a genuine Harry Potter hangover.