The indians did shoot instinctive because they knew that there life depended on them being able to shoot standing up lying dow on a hores when you are in battle and in many situations where you must shoot fast and you don't have time to aim. They had the knoledge to know that if they relied on thier natural hand eye cordination that they who be using the most reliable thing of all your brain which is better than the most enhanced computer ther is. Now isn't that better than putting your trust in some sort of aiming system.