I've got an even better honest to goodness true story. My older brother is a reserve officer for the town and as most are now-a-days is trained to use a defribulator. The local state trooper that used to do the training on these things thought that it would be a good idea to teach his teenage daughter to use it as well. Apparently she was a little apprehensive after he retrieved the training set from the back of his car, which coincedentaly looks just like the real one, so to show her how safe this is he put the paddles against his head and hit the button
you guessed it, wrong set! Supposedly when the EMT's got there 10 minutes later he was still twitching and unresponsive.