Hand grenades just got an upgrade. Normally, those little bundles of death are reserved for situations when you absolutely need to destroy everything in a small area, but a Marine veteran and former scout sniper found a way to improve on that design.
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.