Rockstar Energy Drink Mayhem Festival - San Francisco, CA

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Kyle 'Gumby' Gunther of Battlecross performs as part of the Rockstar... NyhetsfotoGumby,Kalifornien,Konstkultur och underhållning,Live-evenemang,Mountain View - Kalifornien,Musik,Scen,Shoreline Amphitheatre,USA,Utförande,Vertikal,ÖverkroppsbildPhotographer Collection: Getty Images Entertainment 2013 Tim MosenfelderMOUNTAIN VIEW, CA - JUNE 30: Kyle 'Gumby' Gunther of Battlecross performs as part of the Rockstar Energy Drink Mayhem Festival at Shoreline Amphitheatre on June 30, 2013 in Mountain View, California. (Photo by Tim Mosenfelder/Getty Images)