"You take the fun out of everything," Harry teased, grinning. He nodded at the instruction and went to stand in front of one of the punching bags. He had no idea how to punch, he'd been Dudley's punching bag as a kid and while he was good at running and ducking punches, delivering them was another thing. He planted his feet shoulder width apart and gave the bag a few punches, trying to throw his body weight into each blow.