Somehow, I got talked into riding Highline today.  Normally this is not a big deal, as it is a good trail and I enjoy it.  Last night I had 9 pints, and today I was not feeling 100%.  Not quite zombie, but not exactly on fire either.  Anyway, I had my ass handed to me by gravity and my liver.  I didn't hurl, but things got fuzzy a couple of times.  I fell asleep in the car on the way home. 
Great trail in great shape...