a mouse trap. ok little electrical 101 you can touch that metal plate, the white wire and bare copper ground all day, no power no problem. the mouse, however, climbs on the plate, reaches up to eat the peanut butter, and 120 volts/20 amps (if on a dedicated breaker, wall outlet considerably less) of electricity races down his little body, through his heart to ground on the metal plate he’s standing on. instant death. only takes half an amp to stop a human heart if the electricity finds a path to your heart. which this is designed for. same principle as defibrillators. ingenius.
oh. btw, those 9 volt batteries you test on you tongue? they can kill you the same way. just FYI.
