In a situation like that, there are a lot of variables to toss around to know for sure of what is going on. For someone to do that they are either crying for help, or, they mean what they say. If you know which is which, then you act accordingly of course. None of the people there knew what his true motives were and to make it worse, he was under the influence of something which changes everything all together. If you can see he is under the influence as a cop or security from behind, even if you had less lethal ways of trying to stop him (taser ect.) you wouldn't want to use it. When people are jacked up on things, those less lethal ways don't always work and you will just piss the person off, and in that case, a person with a gun. Your only option is deadly force. We are talking about the people in the video here, not any of us. I am positive that if it was a group of us in a room and some jack ass tried to pull a gun, it would have a very different outcome all together. My view is, the moment some idiot points a gun at someone for no reason, they gave up their right to live. If you wait to see if the person is a killer or not, you risk giving up an innocent life. It is just not worth it. I give props to the stupid lady who without any training disregarded her life to try to save others. That kind of heroism isn't seen much anymore.