In chapter 28 of "To Kill A Mockingbird," Jem and Scout are walking home from school, with Scout still wearing her ham costume. The two are being followed by a man who turns out to be Bob Ewell, who is drunk and seeking revenge as he attacks the two kids.
Scout ends up being stabbed in the scuffle, but her ham costume helps to protect her. Fortunately for the two kids, Boo Radley is there to intervene, as he fights off Bob Ewell, stabbing him in order to free the children. Boo Radley then carries Jem and Scout back home.