i remember seeing a show about heavy metal where the so-called "sign of the devil" was discussed by ronnie james dio. according to this program mr. dio is given credit for popularizing this hand gesture in the music world. he stated the name for this sign, but i don't recall what he said. he stated it was something his italian grandmother taught him. she said it was a way to counter someone giving you the "evil eye". i haven't researched this any further, and i myself am still undecided about its real significance. i know in yoga and other eastern traditions certain hand positions are said to channel/activate certain energy pathways in the physical body. perhaps someone can elaborate further on this. peace, doug