See Something. DO SOMETHING

If you see something you should say or do something about it. If there is fighting going on, someone around it should intervene. If someone has a weapon like a gun in a building or area, say something! Don't just let he or she shoot something up. Call the police! Warn the surrounding people! If you're risky, talk them down or be a hero. Take risks. Even knowing this is highly dangerous. You are putting yourself in danger, but you can possibly be saving a lot of people in the long run.