Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.
You may be a badass, but you’ll never be “joining the battle of Gettysburg at the age of 69” badass. Those bragging rights belong to John L. Burns, who earned the title “the old hero of Gettysburg” after he saw the crucial battle from his house, grabbed an old musket and joined the Union line.