In this scene Ponyboy gets jumped by socs. He is walking home from the movies when he sees a car following him and that's when he gets into a fight. His brother eventually comes and saves him.
This scene is a flashback to when Johnny got jumped. Ponyboy isi explaining it in detail to cherry. He explains where and when it happened.
This scene is when Ponyboy and Johnny decide to run away. Ponyboy is mad at his brothers especially Dally because he slapped him. So he grabs Johnny because he knew Johnny also wants to run away and they run for about nine blocks.