They headline Download tonight, four years after a performance that's gone down in festival history as one of the best ever, and three years after the loss of bassist Paul Gray.

"An easy Slipknot show doesn't exist. It's tough � but we wouldn't like it if it was easy," Jordison tells MusicRadar. "Once we lock in, it's like I black out; I don't notice any of the pain I might be experiencing. I've got eight other guys to guide with the tempo of the songs. I don't have time to feel any sort of pain or hurt."