An unidentified man recently pulled out a samurai sword to break up a fight on a Phoenix light rail train.
Two young men, who were beating up a third man, fled the train car, reports the NY Daily News.
The unidentified man didn't injure anyone, but took his sword out of its covering walked over to the fight and got in position as if he might strike them.
One passenger told ABC 15: "There's no accidents and, he was totally there for a reason. And I feel like, hey you know dude, wherever you are, rock on!"
Another witness recorded a video (below) of the fight and samurai intervention. The video has already received nearly 300,000 views on YouTube.
Valley Metro Rail and Phoenix police are currently investigating the incident.