'Piano hammer' style The "piano hammer-style" is a high-speed technique used of striking the bass string with the index finger. In this technique, the index hand is whipped towards the bass string then retracted quickly by pivoting of the wrist. The index finger snaps down and taps the string like a piano hammer. The result is a smooth dark tone which can be contrasted by "back-pedaling" the string with the tip of the finger in an upward pluck. Usually two fingers are required with this technique. Von wikipedia. Hat da einer bilder von oder videos ich kann mir da nicht so recht was vorstellen?