As of yet I've not electrocuted my bass player...yet...Actaully, we've ye to have that experience anywhere. Although after Ed (the other guitarist) saw in science a video of a guitar getting electrocuted by making a circuit when his guitar touched a mike stand he's decided to dig out the spare RCD from the garage.
I think you're right about your pending gig. It'll either be a huge success or an absolute nightmare. Hope it goes well, but if it doesn't than you can add your nightmare tale to the list.