The power of lightning has been harnessed so I am not breaking any new ground here but 17 Lightning Finds is still worth a look-see. Just don't read through them while you're in the pool or the shower because that could be electrifying.
Implications - Perhaps the most scary device on this list is the lightning taser roulette. Who really wants to be served up a ton of voltage while playing a game? Only the hardcore-est of the hardcore, that's who!