A man drew his samurai sword in order to break up a brawl on a light rail car in Arizona. And it worked.
Two young men had attacked another man and started to punch and kick him when the Good Samaritan simply unsheathed the katana and came slowly toward them.
As soon as the train came to a stop, the two attackers ran off. The victim is going to be okay.
A witness recorded video of the fight and uploaded it to YouTube. It has already gotten close to 10,000 views.