Rose and Bergman are both previous winners of the Army's Best Ranger Competition, an annual three-day event which pushes soldiers to their physical limits while also depriving them of sleep. The competition was created in 1982 by Dick Leandri to honor his friend, Lieutenant General David E. Grange Jr., and is now hailed as a way of celebrating the best two-man teams in the Army.

"The biggest thing for us, as leaders in the military, is hopefully we can motivate some junior-level leaders and their subordinates to strive and be better every day," says Bergman.

Tebow starts the challenge by scaling four walls, a feat which he completes with relative ease, albeit behind Captain Rose, who carries out the task with nary a grunt, even when he skins the palms of both his hands on the rough wood.

Next up is something a little harder: Tebow has to traverse a series of overhead obstacles, including nets, ladders, rings and ropes, without dropping to the ground something which requires a serious amount of core and upper body strength.

Tebow drops off somewhere between the rings and the nets, so it's safe to say Tebow won't be winning Best Ranger (this year, at least), and he leaves the challenge with a renewed appreciation of the discipline and resilience of the Armed Forces. As he says of the indefatigable Rose and Bergman: "I'm glad they're on our side."