SACRAMENTO, CA — A routine Green Day show at Golden 1 Center became “the most accidentally innovative acoustic set in punk history” when Billie Joe Armstrong’s guitar erupted mid-“Basket Case.” Fifteen minutes in, his blue Fernandes Strat smoked, then burst into a “surprisingly melodic fireball.” Armstrong didn’t stop. He pivoted, beatboxing power chords with guttural “BWAAAANG” and “CHUGGA-CHUGGA” sounds as fans cheered what they assumed was a bold artistic statement. “At first I thought it was meta-commentary on punk’s commercialization,” said Rebecca Martinez, 34. “Then he went ‘NEEEEOOOOW-WAAAAH’ for the ‘Longview’ solo and I realized something had gone wrong. Or right.” Security footage shows Mike Dirnt and Tré Cool frozen for twenty minutes, staring at their still-working instruments with “profound existential confusion.” Rolling Stone hailed a “tour de force” as Armstrong vocalized feedback, amp buzz, and a convincing wah during “American Idiot.” “SKREEEE-WONK-WONK-WONK,” said David Kim, 28. “Chills.” Afterward, Armstrong blamed “corporate guitar manufacturers who can’t handle real punk energy,” teased a “Vocal Distortion Method,” and an album, “Unplugged and Unhinged.” The fire marshal is investigating. His insurer cited an “acts of rock and roll” clause.