King Leonidas stood out in front of his army of totally badarse Spartan soldiers so he could yell some one liners completely out of context at them.
"THIS IS SPARTA! TONIGHT WE DINE IN HELL! I AM SICK OF THESE MOTHER FUCKIN' SNAKES ON THIS MOTHER FUCKIN' PLANE! CHARGE!"
Then they all completely broke the phalanx formation they made such a big deal about for the first half of the movie to kill stuff in slow motion instead.
Leon charged out, through the front lines, impaling Persian zombies with an American flag while that guy who ends up losing an eye beat the crap out of daleks with a baseball bat, but then, suddenly, Darth Vader crash landed in his death star, killing a billion of the 300 Spartans. He's just that badarse.
To be continued? Maybe, if I feel like it.