Reply #2: I made one of those as a freshman in college. [View All]

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Built it into a glove so I had a stun glove. Two terminals situated at the end of my index and middle fingers respectively. If I touched you with either finger alone, no shock, but both fingers simultaneously packed quite a wallop. Never used it, except to test it on myself.
That's not *quite* as stupid as it sounds, although Freshman physics majors often do very dumb things.