Think of the last metal concert you attended (or what you'd envision one to be like). You're probably seeing hordes of people screaming along to screamy songs, sweating, having a great time. You probably also think of headbanging and jumping around, two very particular physical gestures commonplace in heavy music. What if that couldn't happen? It would be a little weird, right?
That reality will soon become Slipknot frontman Corey Taylor's, as we learned in his tweet below. Bummer!