How does Ghost explain the altercation to Coach Brody so that he does not get kicked off the team?

Ghost explains that Brandon always bullies him, and that today he just could not take it any more. Coach Brody takes this well enough, on the condition that they go to the track, and put in extra work there. While stretching out, Ghost says that he did not do it to make himself appear tough, and admits that the only person he is really afraid of is himself..