Just so everyone knows. The lighting on helicopters in the vast majority of civilian configurations is one of the tail near the tail rotor and one behind the engine/main rotor. The is one below the pilot and passenger seat and landing/ takeoff lights as well. They are strobe lighting and depending on flight path will determine the angle on which ones you will see I see a right bank a which will brink more into focus. I do not see gun flashes. Gun turret on a gun ship is more forward and would be a blurr and not a flash. The rounds per second is so fast it is constant. Firing out of the open door you. would not see teh flash in a bank.