Tafa took exception to the stoppage. He mouthed off with Walker and eventually slapped him. Security stepped between the two fighters are they and their teams exchanged words. Tafa flipped the bird at his opponent during the official decision before Walker cut a pro wrestling-esque promo during his in-cage interview. Despite Tafa’s protest, and some confusion from ESPN commentators Daniel Cormier and Dominick Cruz, the Unified Rules of MMA define a verbal submission as “when a contestant verbally announces to the referee that he or she does not wish to continue; or makes audible sounds such as screams indicating pain or discomfort.”