Answer:
Firstly, Johnny carries the switch w/him. (he keeps it after he gets jumped by the Socs)
Then, Ponyboy goes the movie by himself (where he is also jumped by the Socs)
Two-Bit gets the girl's phone number at the drive in movie.
Darry hits Ponyboy causing him to run away.
Johnny decides to turn himself in after stabbing and killing Bob with his switch.
Hope this helps! <3