I couldn't find scissors tonight so I used nail clippers to cut my yarn. As soon as I pressed down the damn things busted into five pieces of broken metal and one flew up and hit my eye. It hurt really really bad. Luckily I have eyelids that move faster than the speed of light and they protected the ball.
I'm just glad that I wasn't cutting my nails. If yarn did that much damage my fingernail probably would have vaporized the things.