I’m guessing that the single shots may have been at the tanks. Taking aimed shots at a far object. And only 2(?) or so holes in the tanks.
Yeah, I was wondering if he had a special rifle and ammo just for those shots.
And...(flight of fantasy)...was someone supposed to drive the car into the leaking fuel and then blow up the car, igniting the fuel? Maybe he did know a separate ignition was required.
I believe the initial 2 or 3 shots were into the crowd. Some in the crowd went down and it took a few seconds for those nearby to figure out what had happened at which point the rush for exits began well before the first burst of automatic fire.
Pretty sure the tank shots were near the end.