i made a small hole in a chicken egg with a sharp knife. i emptied the iegg and scrambled it. i fed that to my sister. i disinfected the empty egg with bleach. then i filled the empty eggshell with salt, pepper, and ash. then i sealed it with candle wax, and boom.
theres eye irittants in the egg. you crush the egg and throw the contained salt, pepper, ash, or if you're feeling really sinister, ground up glass, into the eyes of your opponent. then while they're temporarily blinded, take out your knife, bam, wam, boom. down. i use mostly pepper.
http://www.youtube.com/watch?v=Pc3fzaJgQwE&feature=related