Our favorite wizard (apologies to the entire cast of Wizards of Waverly Place) is beneath his bedsheets secretly trying to read a book. It's hard for Harry Potter to get anything done in the Dursley household. His reluctant foster parents, Uncle Vernon and Aunt Petunia, hate the boy for simply existing.
We learn that this hatred runs in the veins of the Dursley family (alongside either ice water or turkey gravy) when Aunt Marge visits. She makes the evil aunties from James and the Giant Peach seem warm and cuddly.
After she insults Harry's dead parents, Harry magically inflates Marge like the Goodyear blimp. Afraid he'll be booted from Hogwarts for using magic outside of school, Harry runs away from the Dursley household.