Following in the foot steps of Will Ferrell, Jake Gyllenhaal has joined Bear Grylls for Discovery's Man V Wild. The episode hasn't aired yet, but the above pics have been posted on the network's website - the Bear-back Mountain jokes write themselves. Or, rather, we wish they would so we didn't have to... Something about shit eating, baring all and mounting...

We've got the Ferrell one below, but our favourite Grylls episode is at the bottom.