Rock on! This started out as a quick hand study and quickly grew into a rocking horn hand gesture with a rad lightning bolt. I associate this hand gesture with 80’s Rock-n-Roll, heavy metal, and rocking out to loud music. It has ancient roots and meanings around warding off the devil and evil spirits. Wikipedia says Ronnie James “Dio” popularized it in rock-metal culture, flashing it on stage with the band Black Sabbath. I think its going to ward off sucky art and negative people. So rock on and make your mark by creating your own rock inspired work of art.