Bo's first appearance after the zombies arrive: after making only a few unsavory appearance and establishing himself as "The abusive asshole who will suffer a Karmic Death at the hands of the undead hordes", he's seen saving a nurse at the overrun hospital and having fun taking on an entire horde by himself. And he makes it all the way to the last minutes of the film!
UFC fighter Seth Petruzelli as Silverback getting a chance to put the beat-down on a mob of zombies. He punches them hard enough to spray blood from their faces, flips one over his head (apparently breaking its arm on the way down), and bodyslams one right next to him.
Tommy saving his friends by backing a truck through the wall of the barn they're hiding in.