The Army recently created its own energy bars, designed to give you longer lasting energy. Instead of the high sugar content of typical energy bars, which causes you to crash, Hooah! contains twice as much fat. For a slower release of energy.

And according to popular science, they actually work:

To test that claim, I recently climbed to the summit of California‘s 14,162-foot Mount Shasta with skis and boots lashed to my backpack, eating nothing but 280-calorie Hooah bars. My body felt great, my ascent time was less than when I did it five years ago, and my fatigue came on gradually, not suddenly.

Hooah! is a military phrase to mean everything but no. It’s been said that it originated from the acronym HUA, short for “Heard, Understood, Acknowledged.” When I was in the Army, we said HUA meant “Head Up Ass”.