The perfect case of why concealed carry is a practice not only for a gun enthusiasts pleasure, but serves for great public defense against dirt-bags like this. A CCTV camera from a super market in Brazil, captured the moments a knife wielding mans reign of theft, comes to a halt.

As the situation unfolds, the suspect draws a large knife from the back of his pants, and immediately presses the tip of the blade into the female cashiers back. While the suspect begins threatening the cashier for her life, she begins pulling out the cash from the register. Meanwhile, the man in the white polo-shirt realizes what's about to go down. Without hesitation, the man draws his firearm and forces the man to remove the knife from the cashiers back and put his hands up.

One small thing to take note of from the man with the firearm. I'll give him kudos for his muzzle awareness, because as soon as he draws his firearm on the suspect, he pies out a few steps to avoid making contact with any individuals near or behind the suspect. What a respectable, responsible gun owner.