If you’ve grown bored of using any number of your human senses to tell when someone’s within ten feet of you, then it’s probably time to start trying to convince everyone around you to buy one of these $20 proximity sensing shirts.
Powered by three AAA batteries stuffed into a hidden pocket inside the shirt, the large decal will emit radar-like waves when nobody’s nearby and then lock on and start flashing when someone else wearing the same shirt gets to within about ten feet.
You may ask yourself why someone would buy something like this. And maybe I’d ask that too. And then people would probably buy it anyway. Close-quarters hide and seek? Wow factor? Extra $20 that needs to be spent? Proximity-based frequency detection enthusiasts? The possibilities are endless.
Locked ON – Proximity Sensing Shirt [ThinkGeek.com]