Alice Cooper is not like most people. He’s written some of the greatest rock songs of all time, he’s about to be inducted into the Rock and Roll Hall of Fame and he gets decapitated every night on stage. But when it comes to Led Zeppelin, he’s just like any fan – and he doesn’t understand what’s up with Robert Plant.

Cooper recently criticized his fellow frontman in the press for not reuniting with his Zeppelin bandmates. “I go out on stage and say ‘turn it up,’” Cooper told the Palm Springs Boxing Examiner. “I never get tired of playing my songs.”

The shock rocker can’t comprehend that Plant is working with his Band of Joy project instead.

“They are just standing there. What is so hard? Jimmy Page wants to do it. John Paul Jones wants to do it. And they got Bonham’s son, who is a killer drummer,” Cooper said. “All they need is Robert Plant. But what is Robert Plant out there doing? Playing folk music! What is he doing?”

Although Plant reunited with the other members for a one-off gig in 2007, he’s resisted getting the band back together ever since. Most recently, he told Rolling Stone that he’s avoided the idea of reforming Zeppelin because there’s “nothing worse than a bunch of jaded old farts.”