Remember the guy on the slackline who nearly stole the spotlight from Madonna during her Super Bowl Halftime Show? That was Andy Lewis, a.k.a. Sketchy Andy. Professional slackliner, base jumper, highliner and all-around crazy desert monkey, Sketchy Andy is a study of the fine line between pioneering athlete and fearless maniac. He took the activity of slacklining — long the mellow pastime of climbers hanging out at camp — and morphed it into a trick-studded, danger-laden, full-fledged sport. Be it throwing backflips on the line, pulling in the record for longest highline or going free solo — sans clothes — he constantly pushes the sport to new extremes. But sometimes, he edges a little too close to danger.