all you need to do is play any fretted note…and while playing with your right hand over the pickup nearest the fretboard(called the neck pickup) position your thumb in line with the plectrum so that your thumb lightly brushes the string immediately after the plectrum hits it…by the way this technique is called "side picking" and can be acheived with any electric guitar but it needs practice, so dont get frustrated if it doesnt come to you immediatly…go ahead and be the next randy rhoads, zack wylde or yngwie malmsteen!!!