okay..so im playing master of puppets on guitar, and i came up to this weird trick kinda harmonic sounding trick..but the thing is..i have no idea how to do it! haha it says pull the first string off the edge of the fretboard, "fretting" it against pickup... how do you do this? lol i dont really understand it..and i cant seem to get the sound =\...any help would be awesome thanks,