Sure it's dull as a butter knife. But this polycarbonate blade, designed for combat training, still produces a stabbing pain. Electrodes along its edge deliver 7,500 volts, which is about a sixth of the power of a Taser. It helps give self-defense lessons a sense of urgency. It also helps maintain discipline in the workplace. Wasting time on FAIL Blog when you're on deadline? BZZZT. Sending around rickrolls? BZZZT. Forgot to say "spoiler alert" before discussing last night's episode of Lost? BZZZZZZZZZZZZZZZZZZZZZZT.