This scene shows when all of the socs hopped out of their car and jumped Ponyboy. In chapter 1 on page 4 the one soc says "Need a haircut Greaser"? This is why the one guy has a knife in this scene.
This scene shows when Dally went up to two girls in a drive-in movie. In chapter 2 page 20 Dally went up to the girls and the girls were really not caring about what he was saying. The girls just didn't want to be around Dally.
This scene shows when Two-Bit offered to drive Cherry and Marcia home. In chapter 3 page 37-38 Two-Bit glantlly offers Cherry and Marcia a ride home. At first the girls said their parents could pick them up, but Two-Bit insisted that he would take them.