San Antonio’s historic Aztec Theatre shook with hard-rock intensity on November 6 as Skillet brought its “Comatose 20 Years: Still Screaming Tour” to town. Celebrating two decades of the landmark Comatose album, the Memphis rockers delivered a high-voltage performance blending crushing guitars, soaring vocals and the kind of arena-sized anthems that have made them one of modern rock’s most recognizable acts. Escape the Fate and Autumn Kings would open the show. Frontman John