What do we find out what happened to Jonny in the outsiders Chapter 2?

In Chapter 2 of "The Outsiders," we learn that Johnny Cade has a troubled background, marked by abuse from his parents. He is described as timid and nervous, having been hospitalized after a brutal beating by a group of Socs. This incident highlights his vulnerability and the harsh realities faced by the Greasers, contributing to his character's development and the overall themes of violence and social class in the novel.