A clip from â€œPercy Jackson & The Olympians: The Lightning Thief". Afterwards, they go to the replica of the Parthenon in Nashville, Tennessee and find the pearl on the crown of the statue of Athena. Since the place is public, they hide in the bathroom until after closing time. Annabeth knocks out the five janitors and Percy uses the flying shoes to get the pearl, but as they are about to leave, the janitors transform into the Hydra. Percy drops the pearl and flies up to behead the five-headed Hydra but for every head he cuts off, two more grow back. Percy makes a wall of water in front of him in order to shield him from the Hydra and allow him to get the pearl. On their way out the Hydra breathe fire at them, but at that moment, Grover uncovers Medusa's head, effectively stopping the fire and petrifying the Hydra.