Ignorance is bliss? Stop and Stand Up: an example

Today on the bus from work to school, one of the younger children from a school was bullying a small year 7. A man realized this and had a go at the boy asking him to stop and asked him to have a go at him instead of the small year 7. The boy retaliated with you're older than me, how old are you though? To this, the man replied: age is irrelevant, it doesn't matter whether I'm bigger or older than you, you're picking on somebody just because they are smaller than you. So pick on me if you think you're so hard. You're a fucking bully. Then the man went to sit next to the bully and had a quiet talk with him. I didn't realist what was going on until I heard them shouting it when I realized I had been at the same bus stop as them, and on the same bus, I felt bad. If a complete stranger had stop and stood up and I hadn't even noticed what was happening around me because I had my headphones in. I wonder if I'd know if I'd have gotten involved and could only hope that I would have. However, now I k now that if I ever witness that situation I would because that stranger has inspired me. It's weird the effect your actions can have on someone without even realizing. I regret that I missed such a situation because I had my headphones in and am going to try to look out for situations such as this in the future. I can't believe how ignorant everyone else on the bus was to it but also and especially myself. STOP and STAND UP because you never know who you may inspire or make a difference to.