The middle one with the fuses reminds me of a story I heard about a place in England. They did experiments with very big magnetic fields and used submarine batteries as the primary power source. The batteries were in this kind of silo arrangement, and one day a guy working up top dropped a wrench about the size of the one in the meme. Apparently, it was long enough to bridge the bussbars coming from the batteries. By all accounts there was a flash, a loud bang, and no more wrench.