It’s bizarre. And pretty accurately describes their plan of action.
When they come for yours, aim for their knees and lower abdomens. It might not kill them, but they are rendered ineffectual immediately, down and requiring immediate extraction. It also makes the man behind them a lot more wary and cautious.
And always assume the head shot will be a surprisingly small target, beneath a newer-issue body armor, and a chest shot is equally difficult or impossible.
Remember, to the National Civilian Defense Force, YOU are the enemy, and annihilation is their only strategy.
Use their wounded for bait, and beware flanking maneuvers.
Unless, of course, you use cannon.