Terrifying History on Instagram: "On December 15, 1997, during a Green Day concert at The Fillmore in San Francisco, frontman Billie Joe Armstrong abruptly halted the performance. Witnesses reported that Armstrong had observed a man in the crowd aggressively harassing a young female fan near the stage. Without a word of warning, Armstrong jumped off the stage, confronted the man, and delivered a drop-kick that sent him backward into the crowd. Security personnel quickly intervened, ejecting the