PERCY WAS WAITING FOR THEM. He looked mad.
He stood at the edge of the glacier, leaning on the staff with the golden eagle, gazing down at the wreckage he’d caused: several hundred acres of newly open water dotted with icebergs and flotsam from the ruined camp.
The only remains on the glacier were the main gates, which listed sideways, and a tattered blue banner lying over a pile of snow-bricks.
When they ran up to him, Percy said, “Hey,” like they were just meeting for lunch or something.
“You’re alive!” Frank marveled.
Percy frowned. “The fall? That was nothing. I fell twice that far from the St. Louis Arch.”
“You did what?” Hazel asked.
“Never mind. The important thing was I didn’t drown.”

The Son of Neptune, Chapter XLVIII