I looked at Thalia. "You're afraid of heights."<br /><br />Now that we were safely down the mountain, her eyes had their usual angry look. "Don't be stupid."<br /><br />That explains why you freaked out on Apollo's bus. Why you didn't want to talk about it."<br /><br />She took a deep breath. Then she brushed the pine needles out of her hair. "If you tell anyone, I swear—"<br /><br />No, no," I said. "That's cool. It's just… the daughter of Zeus, the Lord of the Sky, afraid of heights?