I sprained my knee the day before my first big gig (It was a big field party being held by one of my brothers friends) and the doctor gave me codein (sp?). Well I took a couple about an hour before we went on and while I was playing guys were handing me beers to drink. About 45mins into playing I couldn't even stand anymore, the bass player was literally holding me up. After about an hour they asked us to stop. -LOL-