Final answer:
In 'The Sea of Monsters,' Percy and Tyson are attacked by Laistrygonians during a dodge-ball game, revealing Tyson as a Cyclops and Percy's half-brother.
Step-by-step explanation:
In the novel The Sea of Monsters by Rick Riordan, which is the second book in the Percy Jackson & the Olympians series, Percy and Tyson are attacked during a dodge-ball game by a group of giant cannibalistic giants known as Laistrygonians. This intense scene is a pivotal moment in the book as it not only showcases the danger the characters face but also reveals Tyson's identity as a Cyclops and Percy's half-brother. The use of mythological creatures and the concept of a surprise attack during an ordinary school activity highlights the inventive merging of modern and ancient worlds that is characteristic of the series.