Don’t call him a slacker, this World Champion is even deeper than his slackline skills indicate.  As Alex Mason bikes to class along the ocean at University of California, Santa Barbara, he resembles just another 20-year-old college kid. But go anywhere in Europe, Japan and certain circles here in the U.S.A. and he’s already toting legend status. Winning a world title at the age of 16 doesn’t make you a child star. In a sport like slacklining, it transforms you into an international icon. Thanks to an early competitive rivalry with his twin sister, some pre-pubescent grooming from sl...