how does Ender turn Rose's foolish order to his advantage?

Rose tells Ender to jump through as soon as the door opens and go straight toward the enemy's gate. Ender freezes several of the Centipede Army soldiers before becoming disabled. This success leads to a new strategy across the school: instant emergence into the room. As Ender joins in the fighting, his standing sinks to fourth place, but he soon learns enough to make it back to first place.