Professional Stand Up Paddle Board (SUP) racer Casper Steinfath from Denmark gives his trademark "Viking Roar" on Friday in preparation for the Naish N1SCO one design Stand Up Paddle Board (SUP) World Championships at Sydney's Lake Narrabeen, Australia, Nov. 4, 2016. Up to 100 of the world's best stand up paddle boarders will participate in the competition. (Xinhua/Matt Burgess)