Let no one say Bear Grylls doesn't know how to get publicity. Fresh from sparking controversy by showing contestants having enemas on his UK reality show The Island, the survival expert has recruited Zac Efron for the trailer for his NBC series Running Wild. Not only that – but he persuaded the High School Musical and Bad Neighbours star to strip off his shirt as the buff buddies rappel down a cliff in upstate New York. The inevitable beefcake fest features Grylls proclaiming "we're gonna do this together" before lashing himself together with Efron and heading over the edge. The series also apparently features the pair skydiving, while Monkey can't wait to see what Grylls persuades Ben Stiller to get up to.