A while back, Wired reported on a few people that were getting magnets implanted under their fingertips. Apparently these people could sense live wires, ringing cells phones, and other electrical phenomenon due to transient magnetic fields emitted from the active devices. Well, it looks like implanting random items in your body without medical knowledge isn't a good idea. This lady had one which fractured and fragmented, causing infection. Nothing a little coating of selastic wouldn't help prevent - I was astonished that they didn't coat them with some material acceptable for implant to begin with - but it looks like the experiment is over for this person. Here's a link to her LiveJournal entry.