John knew about the Labyrinth. He knew about the Minotaur and Daedalus and the hero who had survived the maze. He knew about Percy Jackson's quest through the dreaded puzzle with Annabeth Chase and others. And if he was being honest, the stories freaked him out. But he knew that it was possible to survive it. Percy and his friends had proven that. And he had a lot of good company. He was confident and when Andrew asked who wanted to save the world John smirked and said, "Me."