I myself try to stay sober when playing. There's been a couple of times when I had a little too much (and once when I was attempting to work a Line 6 control board while playing/ singing SRV's Mary Had a Little Lamb... ugly, ugly).

Probably the worst thing I've ever done while drunk was pass out next to a kerosine heater... woke up with "sun burn" on my legs and shorter hair... smelled like a perm for about a week.

But hey, it's just about grown back now.

Really though, I've heard of some pretty insane stuff other people have done. Saw my brother take a leak on Main St. in Tunbridge, VT one fine afternoon... as all kinds of people drove by on their way home from work. He can't remember a damn thing about it though.