The part that it is missing is that in real life you have no idea what is about to happen. You go from "enjoy your fries sir" to "GET THE F OUT OF THE CAR!." There is no way that these sports can prepare you for what you will do, mainly because you know what is going to happen. One of the things so far about this forum that has impressed me is the lack of false bravado and chest puffing. For someone to say "When they come for my car I will just______" is bs, because you don't know what you are going to do. A lot of times in training we tend to forego the startle reaction at the point of ambush, we don't build it into our routine. But discounting something that will happen leaves us behind the power curve. This is something you are not likely to simulate well to a high degree of stress in a course involving live fire, mainly because it is different when you know the targets can't shoot back. At Valhalla we (Rob, Jeremiah, Brad to some extent and myself) spent a lot of time doing high level simulation stuff. It is great to see the Spec Ops guy go from hero to homo when he realizes that no one has his back and that his target is now mounted up and pushing his head through the floor. The same goes for car jacking scenarios, a pop out target is different from a human being walking up to the window and pulling you out by your neck. IDPA can't simulate that, at least not with live rounds.