Microblog post: "My son is only in 10th grade and look what he invented!! Harvard here we come!". Pictures of a frame that holds a cable that can be attached to the metal of a power plug
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[–] 1 point 2 days ago

It will either instantly trip the breaker or do absolutely nothing, depending on how it's wired internally.

The real danger comes from when only one end is plugged in, though. With only one end plugged in, the other end becomes a 120V cattle prod.

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