From a post by Bob Owens of BearingArms.com
Roughly the first have of the video is the student’s run through the shoothouse, and that’s followed by the most important part for the student, the instructor’s critique. It’s here where you discover just how badly you’ve screwed up. You learn from “dying” here (often repeatedly) so you don’t end up dying in the real world when it matters.
This serviceman was “killed” by the very first target, who was a bad guy standing outside an open window of the first room he was focused on clearing. You can see here where he would have taken hits at 1:12 in the video.
Here is a link to the entire article: http://bearingarms.com/gunfighting-is-a-thinking-mans-game/