Percy questions why pegasi gallop while flying, expressing curiosity about their unique behavior. Blackjack, the pegasi, responds with a rhetorical question about humans swinging their arms while walking, highlighting that some actions seem inherent or instinctive. This exchange reflects the idea that certain movements and habits are simply a part of their nature, not necessarily explained by logic.

This dialogue captures the essence of how creatures, whether mythical like pegasi or ordinary like humans, have their own idiosyncrasies. It emphasizes that understanding behavior can sometimes go beyond reasoning, pointing towards a deeper connection to one's essence and instincts.