Oliver nodded approvingly at Natalie's flying and throwing technique. Although her aim is worthless, he thought with a chuckle so as not to give away his thoughts.
He chased after the wayward quaffle, then flew back to Natalie. "When you throw it, be sure to follow through," he said as he put the ball in her hand. "Like this."
He pulled arm back gently and then moved it forward in a throwing arc. "Follow through."