When does Scout act courageously in To Kill a Mockingbird?

In Chapter 15, Atticus leaves his home to sit outside of Tom Robinson's jail cell to prevent anyone from attempting to harm Tom before the trial. Jem, Dill, and Scout search for Atticus and find him reading the newspaper in front of Maycomb's jailhouse. Suddenly, several cars arrive from the Meridian highway and a group of men begin to surround Atticus. Scout sneaks out from their hiding place and runs into the middle of the group of men. Unaware of the dangerous situation she has just entered, Scout tries to make casual conversation. Jem and Dill follow Scout and Atticus tells Jem to go home. However, Jem refuses to go home and leave his father's side. One of the men from the Old Sarum bunch grabs Jem by the collar of his shirt and says, "I'll send him home" (Lee 94). Scout yells, "Don't you touch him!" and kicks the man in his groin (Lee 94). Atticus then tells Scout to calm down and not kick folks. Scout responds by saying, "Ain't nobody gonna do Jem that way" (Lee 94). Scout acts courageously by defending her brother to the best of her ability. She saw that Jem was being harassed and she came to his aid by kicking a much older man as hard as she could.