Once, just a little tipsy, I was riding through Cambridge, Mass just as it was misting. Not enough rain to wash anything away, you understand, just enough to really get that film of oil up and into play. I was moving up between traffic real slow and deliberate like and hit a thermoplastic crosswalk. Without warning my rear slipped out from underneath me (whoop!) and I landed on my ass on the crosswalk just as the light was changing. Left a big old bruise on my left check and a U-shaped welt on my right from the lock. It took me a week to be able to sit down properly.
That and the time I was just riding along and fell over for no good reason at all convinced me that it's not generally a good idea to ride drunk. No need to be pulling that junk in traffic.