I flew as a replacement a couple of times. I called it shits n' grins. There is nothing in the world that sounds like a mini gun. That growl and 6 ft. flame going straight out at about 120 knot+ along with the sound of the rockets coming out of the tube, burning the shit out of your leg like welding burns. It will honestly put little pin holes in the leg of your fatigue pants. Then the rush on top of that when you get hot, pumping that left arm to pull slack in the link belt. Damn, what a rush and all of it going at one time, you can't here a damn thing!!