I think this video is a great illustration of why you have to be accurate in inches. Ultimately, the bad guy was shot at point blank range so accuracy didn't matter at all. But they were extremely lucky that they had that shot to take. If that were your kid, would you want to wait until you had negotiated a chance to make a point blank shot, or would you want to put a bullet in his brain as soon as you saw him?
Look at the way the bad guy holds the kid. That's a matter of hitting a playing card at 12ish feet under crazy pressure. It's not a difficult shot, in itself, but if you add the pressure of the situation and the fact that most people have no idea what their holdovers/unders are at 3-7 yards and that shot gets a lot tougher.
