I must admit that I'm not impressed. An AK47 is a solid weapon, but a skilled user should be able to hit a target so far away that the muzzle blast doesn't ignite the target. I used to carry a 1903A1 Springfield and enjoyed smashing dinner plates at a thousand meters.
As for all the yelling, I can't help but recall the speech given by Suetonius addressing his legionaries before Boudica attacked: "Ignore the racket made by these savages. There are more women than men in their ranks. They are not soldiers - they're not even properly equipped. We've beaten them before and when they see our weapons and feel our spirit, they'll crack. Stick together. Throw the javelins, then push forward: knock them down with your shields and finish them off with your swords. Forget about plunder. Just win and you'll have everything."
If sheer noise and aggressiveness meant anything the Pekingese Dog would rule the earth.