On Monday’s season premiere of “Man vs. Wild,” Jake Gyllenhaal’s wilderness prowess will be put to the test as he joins Bear Grylls for a two day adventure in Iceland. In the four new previews below, during which the “Brokeback Mountain” star  – who happens to suffer from a fear of heights – crosses a dangerously deep ravine, attempts to extract a sheep carcass from a huge hole, and navigates around an icy crevasse, we’re given definite proof that the Hollywood hunk never phones in a performance.

See how super buff Jake prepared for the trip:

Watch him battle a terrifying blizzard:

Watch him cross a deep ravine:

Watch him attempt to remove a dead sheep from an icy hole: