Bend your middle finger and ring finger down toward your palm. Bend the fingers so that the tip of each is nearly touching the palm. Keep your pinkie finger, index finger and thumb fully extended.
Bring your thumb inward and place it over the bent ring and middle fingers. The thumb should be on top of the ring finger and middle finger, covering them as well as helping keep them bent and pressed into your palm. Keep your pinkie and index fingers fully extended to make the "horns" of the hand.
Show off the hand gesture to those around you. Hold your hand high above your head or across your chest, perhaps while you play a musical instrument. Make a head-banging motion with your head if you like.