Answer:
While driving away from the storm, Percy notices a creature following them in the distance. He questions Grover and Sally’s relationship and what kind of animal Grover is. Grover explains that he is a satyr in charge of protecting Percy, but the less he knows, the fewer monsters he will attract. Sally begins driving Percy to the camp for protection after learning that the three old women Percy encountered were the Fates. The car swerves into a ditch, which injures Grover. Sally encourages Percy to get help by running past a big tree that marks the property line to safety. He refuses to leave without her and Grover, despite the creature that is steadily creeping up on them.
Sally and Percy finally pull Grover out of the car and head toward the tree. Outside of the car, Percy recognizes the monster as half bull, half man. He starts to name the monster, but his mother warns him that names have power. She advises him to jump to the side if the creature attacks, since a bull cannot change directions easily. Percy does so when the bull charges, which angers the monster. The monster then attacks his mother and Grover who are on the side of the road. The bull-man grabs Percy’s mother by the neck, and she disappears into a golden light. Furious, Percy defeats the monster by tearing off one of the monster’s horns and shoving it into the monster’s ribs. Percy helps Grover to safety and the two pass out on the porch of a farmhouse after a young girl recognizes him as the “one.”