We really like doing failure drill here, shows you really quick where you need to work on things more your own self then the weapon you choose. I think it really builds an intimate relationship between you and your weapons when you can get through any failures and back into operation quickly, it builds much needed skills, as well as show you where each weapon has any shortcomings, and you find out how to deal with those or you fail !!! I like doing a self failure drill with people, where I tie one arm to your belt, or I make a leg useless, or force you to shoot from unconventional positions, because life happens at the worst of times, and knowing that YOU CAN, sure beats the other option!!!