Give credit where it's due. This chap did all the right things.
He had situational awareness. He was alert. He erred on the side of caution and alerted others of the psycho's suspicious behaviour. He confronted the psycho to protect others. He armed himself.
That's right. If you ever find yourself in a similar situation, find a weapon. Any weapon. Choose to survive. Choose to be the victor. Make the mutherfarker suffer AND pay.
A lot of these twisted mentally sick psychos around who want to knife others. Choose not to be the victim. Choose to survive. Choose to be the victor. Make the mutherfarker pay.