When Russell Westbrook banked in a buzzer-beater from just short of half-court, Kevin Durant called the shot 80 percent luck and only 20 percent skill. Whatever the case, it was just what the Oklahoma City Thunder needed. Westbrook banked in the circus shot during a rough-and-tumble 27-point outing, Durant added a season-high 26 points and the Thunder beat the Cleveland Cavaliers 106-91 on Sunday night for their fourth straight victory.