In Percy's dream, Grover is running from the Cyclops Polyphemus and enters a wedding shop. The shop then blows up and Percy hears Polyphemus' voice. When he wakes up, he sees a dark object in the window which he describes as a shadow belonging to no one and nothing. The same day at Meriwether College Prep, Percy is stuck playing dodgeball with Tyson, his friend, against large seventh graders who turn out to be Laistrygonian Giants. They summon explosive dodge-balls in an attempt to kill Percy, but he is protected by Tyson who is unaffected physically or mentally by the monsters' cannonballs. Annabeth saves Percy by stabbing the last Laistrygonian, Joe Bob, from behind and takes Percy and Tyson back to Camp Half-Blood by calling the Gray Sisters and their taxi.