Chapter 3: Percy stood in the courtyard in front of the water fountain where he saw Grover talking to Juniper. It was Monday night and Percy was getting ready to test out his new powers. He spent the day listening in class which actually raised his Int! Seriously! After the day of classes ended Percy got a ping and it said,
Answer: Chapter 3 : "Grover Unexpectedly Loses His Pants" While in their little cabin they realize it is going to hurricane. When they were about to leave Grover was standing at the front door with "shag carpet pants on". They all get in the car and Percy's mom floors it. Then Percy realizes that Grover is half goat
