Corey did not break a blood vessel in his neck anytime recently. It happened a few times before he did it while recoding slipknots “All Hope Is Gone” album in 2008. He is alright now and the tour is going great. The band to used to him breaking it and when it happens the have a doctor on speed-dial. It doesn’t happen to often so don’t worry slipknot fans he will still sing the hard rock and metal we all love.