Like waking up to find a metal plate has been inserted into your head.
My friend had a story that involved a hangover and a trampoline, but I can't remember exactly how it went.
Nowhere to hide!
Starts with a deceptive feeling of 'hey, I'm in pretty good shape' ... then comes on like gangbusters as the day progresses.
Has an unfortunate tendency to couple itself with the False Plateau Hangover
Enter your own Five Worst Hangovers, or something else.