This is a video from a robbery of a kangaroo in Ocoee FL. where a good samaritan came to the defense of the clerk getting beaten down with a bottle. He heard her screaming from outside and ran in with gun drawn and shot the robber. He was justified, but the video shows some simple training would have helped him to better handle the situation. Although its easy to be critical watching a vid after the fact, I'm sure it's a little different when you are going through it first hand. The biggest mistake he made was all the talking he did to the local news .
LiveLeak.com - Alternate angle,longer version of 'Surveillance video shows customer shoot robber'