"EDIT: Wow, this is apparently a thing." More interesting, in my opinion, is "surgically" inserting a little magnet into the tip of one of your fingers, which

"EDIT: Wow, this is apparently a thing." More interesting, in my opinion, is "surgically" inserting a little magnet into the tip of one of your fingers, which then vibrates in magnetic fields such that your nerves can feel it. This gives you a sixth sense - you can sense magnetic fields. http://io9.gizmodo.com/what-you-need-to-know-about-getting-magnetic-finger-imp-813537993 http://io9.gizmodo.com/what-you-need-to-know-about-getting-m...