Holy crap, that was Yon? That NCO who dropped the malfunctioning weapon was my current BDE Command Sergeant Major. He ran up and beat the offending haji to death with his MICH.
I think you are describing another action. As I remember reading. A sarg advanced quickly down the alley way and “shot” the haji through the partly open door who was pumping bullets into the good colonel. The PFC had frozen in the alley way, and Yon saw what was happening and saw the colonel go down.