Everyone is entitled to their own methods and principles underlining those methods. Only time will tell which ones have the best success rate. Athough I have never seen or heard of anyone who can control an attacker's trigger finger nor have I ever seen or heard of anyone who has not set off a hair trigger firearm when they have grabbed the weapon, I am sure there are people out there with those superhuman capabilities. As for me, I'll stick with the time proven principles that have left less defenders and bystanders shot, such as not grabbing the gun, not struggling with the gun, and pushing the gun away and up (definately not down). I shall stick with what I have been instructed on.