what some dark and nefarious is going to happen this evening in Chapter 27

It is nearly Halloween, and Mrs. Grace Merriweather writes a pageant for Maycomb people to perform about the history of the county. She wants children to play the parts of Maycomb's agricultural products, and Scout is assigned to play the part of the pork. She will wear a large costume made of chicken wire and wrapped around with brown cloth, which comes to just above her knees. That night Scout and Jem are forced to walk home in the dark.