From the "You MUST be joking" file... metal throwing cards.
These are actually metal throwing cards. And yes, apparently people have purchased, sharpened and used them. Here I sit, thinking about my XD 45 (delayed by the BATFE every time, so will have to wait until Monday) and what sort of rounds to purchase for range and defense use. I had no idea that all I really ever needed was some sharpened sheet metal... won't the Brady twits be thrilled.