That gun was designed to make people look stupid. For a bullet like that to be fired the person shooting is just being set up for failure. All the things mrmike mentioned would help but the biggest thing wrong is the shooting stances of all the guys in the vid. If you have ever watched a professional shooter they lean forward and have their weight on their front foot all of the guys except the last guy were leaning back hence they all fall over. The last guy has fairly square stance witch is better and the results are obvious.
Still makes for a funny vid:thumbsup2: