Living in a big city, you never know what sort of invisible hazards are lurking about. There could be terrorists, pollution, terrorists, radiation, terrorists, second-hand smoke, terrorists, car exhaust, or even terrorists in the air and you would never even know! That’s why this handy keychain could save your life by beeping if it detects any radiation in the air. (via OhGizmo!)
I do wonder though how effective it can be in your pocket with your keys. Do you suppose it would beep if your crotch is smelling a little funky? That could be embarassing.