MIT prof's self-defense dress
Not much detail on this one, but MIT assistant professor of architecture J. Meejin Yoon has designed a self-defense dress that mimics a porcupine, protecting its wearer from attacks and unwanted advances. The "quills" on the dress are stiff piano wires that are controlled by proximity sensors, although it's not clear if they're actually designed to stick into the attacker or just scare them off.