With each step he completed, he gave her a small nod. At which point she moved to the next. However, while focusing on his wings, he felt a subtle anomaly. He thought it was a sudden spike in blood pressure the first time he felt it. But it continued, every thirty to fourty seconds as his blood pulsed throughout his wings... and his ears too, now that he was focused on it. He thought about mentioning it for a moment, but it didn't hurt, so he continued with the lesson.