China's "Kung Fu Monkey" Song Yadong has dazzled spectators with a knockout victory at the Ultimate Fighting Championships. The 21-year-old landed a perfect right cross on his opponent, Alejandro Perez, just over three minutes into the opening round in Las Vegas on Saturday. It was his first time fighting outside China. Song is the second youngest fighter in the UFC and is now only the second bantamweight in UFC history with a first-round knockout at 21 or younger.