Buy an electroshock "stun gun". Get some magnet wire. Make a coil. Hook the ends of the coil to the output of the electroshock device (scrape away the insulatio

Buy an electroshock "stun gun". Get some magnet wire. Make a coil. Hook the ends of the coil to the output of the electroshock device (scrape away the insulation enamel and solder it in place.) Ideally you'd heat-shrink those connections (slip the heat shrink around the coil wire before soldering, slide it into place, shrink it) and cable lace/tie to keep the coil formed nicely. That's about it.