The greatest advent in rock and roll technology EVER. Four people throw up rock horns and then arange them in a vague rectangular type shape,with connecting pointer and pinky fingers arranged at 90 degree angles.
It is essentially a double ROCKTANGLE
A picture of a correctly performed ROCKTAGON can be seen here
GUY #1: "Dudes this music rocks so much that I'm affraid that regular old rock horns just aren't gonna cut it."
GUY #2 "I know lets throw a ROCKTAGON."
GUYS #1,3,4: "That's a freaking awesome idea."