“Hold on!” Hazel warned. She leaned forward and said, “Arion, run!”
The world seemed to elongate. Sunlight bent around them. Arion shot away from the Amazons and sped through downtown Seattle. Hazel glanced back and saw a line of smoking pavement where Arion’s hooves had touched the ground. He thundered toward the docks, leaping over cars, barreling through intersections.
Hazel screamed at the top of her lungs, but it was a scream of delight. For the first time in her life—in her two lives—she felt absolutely unstoppable. Arion reached the water and leaped straight off the docks. Hazel’s ears popped. She heard a roar that she later realized was a sonic boom, and Arion tore over Puget Sound, seawater turning to steam in his wake as the skyline of Seattle receded behind them.

The Son of Neptune, Chapter XXXII