Sweden’s Walter Wallberg kept his cool as he stunned Canadian top favourite Mikael Kingsbury for Olympic freestyle skiing moguls gold at the Beijing Games on Saturday. Wallberg, 21, was on fire as the last competitor in the last six-man round to claim gold with a score of 83.23 from two jumps and skiing down the 250-metres Secret Garden Olympic Moguls Course. Kingsburg, the six-time world champion, nine-time overall and moguls World Cup champ with 71 wins to his credit, missed a second straight gold and had to settle for silver as in 2014, totalling 82.18. Japan’s Ikuma Horishima won bronze on…