MMA’s all-time best knockout artists typically have calling cards. For Mirko Filipovic, it was his devastating kicks. He famously declared the right leg would send you to the hospital and the left would send you to the cemetery. Chuck Liddell, on the other hand, typically relied on his fists. His hooks flew with bad intentions, and when they connected, they frequently put out opponents. Honing concussive power behind a specific technique takes time, and most fighters have specific favorites on which they rely. What makes Edson Barboza so scary is the multiplicity of ways he finishes world-class opponents.