watching too much hollywood movies?
the time taken to draw a gun could have used to move away from
the path of the car
Definitely takes more time to draw gun and aim as compared to
moving away from the path of the vehicle.
I am still curious how he could aim at the tyres of the car if
he stood in the direction of the car. He's either got x-ray vision
or he took time to prone down infront of the car to take aim.

Maybe he was driving a lorry or a trailer. 