Magnets are a favourite of Grinders because they're relatively simple, small, cheap and easy to implant, yet they can impart a pretty cool superpower: Magnetoreception. There are plenty of animals that naturally have this ability, allowing them to navigate using the Earth's magnetic field. The magnetic implant allows its owner to detect electromagnetic fields in much the same way. Some even report being able to tell the difference between AC and DC current - the former feeling like pins and needles, the latter more like a bubble pushing against the skin. As the procedure is very much a DIY affair at the moment - administered without anaesthetic - the results are varied, with implants sometimes getting rejected by the body. It's also probably advisable to stay away from strong magnet, lest your implant gets ripped from your body. The implant also allows you to pick up metal objects without grasping them, useful for winning bets in bars if nothing else.
