caltrop ('kal-tr&p), noun. a device with four metal points so arranged that when any three are on the ground the fourth projects upward as a hazard to the hooves of horses or to pneumatic tires
I don't know what sadist engineered my daughter's butterfly hair clips, but these sharp, metal, half-inch-sized caltrops seem like they were designed with pain in mind rather than hair. I think I caught one of my action figures using one as a weapon.
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There has been a little curiosity about my profile (very little, but I thought I'd share anyway). One of my fondest memories in college is of going down to the game room and playing Street Fighter II - I don't know why I tend to be drawn to the token large, hairy, monster in the games that I play. When the cool action figures came out a few years ago, I had to have my own Blanka.