UFC President Dana White is selling slap fighting as the next big thing in combat sport, and the Nevada Athletic Commission has sanctioned the Power Slap League for competitions. In Power Slap bouts, fighters take turns hitting each other in the face with an open hand. A fighter has up to 60 seconds to recover and respond after receiving a blow. Some barely flinch, others stumble. Some are knocked out. Critics say the fights are unsafe because fighters can't defend themselves and risk brain damage. White says the sport is safer than boxing and predicts Power Slap is the next big thing in combat sports.