Some guy is attacking someone else in their car. He's hitting the car, trying to break windows or whatever. That's when the driver had enough and clipped the guy trying to get away. Then the guy who fell down, after he got hit by the car the first time, GETS IN FRONT OF THE CAR AGAIN.
The driver had enough of this nonsense and hits the gas, sending the attacker sliding across the parking lot.
Then he honks and drives away.