Very interesting video by Dave Young from Arma Training a member of Vistelar. He brings up some really great points about target acquisition, sight confirmation, and reaction vs when to take action. I don't know many people that would shoot a bad guy in the back if all he did was turn his head and make visual confirmation where you are. However after watching this video, I'm beginning to rethink my tactics.
http://yourfamilydefense.com/
http://yourfamilydefense.com/