See Dave Grohl Rock 'Ace of Spades' With Pantera, Metallica, Slayer Members

Dave Grohl was a surprise guest at Friday night’s Dimebash, the annual celebration of late Pantera guitarist Dimebag Darrell, and at the Los Angeles gig, the Foo Fighters frontman – along with Pantera singer Phil Anselmo, Metallica bassist Robert Trujillo and former Slayer drummer Dave Lombardo – joined together onstage to pay tribute to another…