Everyone with half a functioning brain knows that diving on a live hand grenade to save your friends is one of the single most selfless, balls-out heroic acts of valor that any human being can perform. It takes a special, rare kind of person to come face-to-face with their own destruction, resist every natural impulse of self-preservation, and unhesitatingly give themselves up in a final, purely-selfless feat of bravery, trading in the most precious thing a human has to offer – their life – so that others might live. It's such a paragon of ultimate selfless human sacrifice that nowadays it's the standard go-to analogy for everything from taking all the blame for a team-wide corporate fuck-up to unselfishly talking up the homeliest girl at the bar while your buddy tries to hook up with her best friend (who is invariably about a thousand times hotter than him and wouldn’t spit on him if he were melting in a pool of Hydrochloric acid some twisted bizarro alternate universe where tan silicone-augmented vat-grown bar-hopping college chicks are irresistibly attracted to sweaty neckbeards). It's such a heroic testament to the will of the human spirit that more Medals of Honor and Victoria Crosses have been handed out for this single act than for any other deed in the history of combat.
Unfortunately, despite this being a universally-acknowledged feat of righteous heroic awesomeness, the fact that the entire action is over in three to five seconds combine with some horrifically-tragic consequences for the hero to make grenade-hopping a pretty tough subject to write a Badass of the Week article about.
Unless, of course, we're talking about Jack Lucas of the 1st Battalion, 26th Marines.
Because Jack Lucas jumped on not one but two grenades to save his friends.