Metal fans are in many ways like soccer hooligans. I can see it now; and a soccer stadium would be a great place to do this; on one side there would be a hundred guys in Metallica shirts, on the other; Team Pantera. The whistle goes, and "Charge!"; off they go!, running like the battle scene from Braveheart or something, and then beating the crap out of each other at the center of the pitch. I'd pay to see that!