And we’re going to teach you how to punch like a girl. Because you know what?” Beyoncé’s “Run the World (Girls)” suddenly blasted from the invisible speakers in the room, and the whole class jumped, then laughed, then sang along. “That’s right. We run the world, girls. Don’t ever let anyone forget that.” Natalie beamed at them. Nik suddenly noticed the size of her biceps. She had definitely misjudged this woman by her blond hair and cheerful voice, that was for sure.