You should protect others from being harassed.
Oscar sees someone bullying his co-worker at work.
Oscar wants to get back to work in peace.
Oscar intervenes in the bullying, telling the bully to leave his co-worker alone.
Oscar goes to another part of the building, so he can't hear the harassment.
The fight stops peacefully and Oscar returns to work.
Oscar's co-worker is assaulted by the other person.