That is incorrect. Please open the link, this is an image that I have not seen discussed. When you look at the image, imagine each rod has a pistol stuck on the end of it - all four rods, then imagine where OP would have to be standing to hold and aim each of the four pistols to get the bullets to hit the same area behind the door. The first shot is the highest up, 3rd from the left. So to fire the other three shots OP had to move to the right of that rod and to the left of that rod.
Moving around like that and targeting (aiming) at Reeva's voice as she fell. It's amazing!!!