Diary entry thing- perspective from a Bystander

I remembered how ordinary today was. We had assembly, our normal subjects and then as you know it home time. I usually walk home with friends living in my apartment. As I was walking home, I heard a cry and the sound of a body being slammed on the ground. I looked around the park, Bob pointed somewhere to my right and shouted "Over here!" We ran towards the sound and saw a boy in our year getting beaten up by two unfamiliar students roughly about the same age. They were, however, much bulkier and bigger than the helpless boy.
I stared and thought, is that what people do nowadays? I could see Bob looking excited and almost eager but Frank's face was the opposite, he looked appalled and disgusted at the fight. Well, 2 on 1 assault. I was shocked at first but it soon slowly turned to confusion. Bob shouted out "What are you fighting about?"
The bullies completely ignored him and carried on pounding the poor kid. Frank called "Let's get out of here... they're just a bunch of ******s." Frank obviously had enough. On the other hand Bob told me "If you stay with me I'll buy you a coke!" And so I stayed.