靜止是關鍵的 at least in this case

My friend had a car accident in the parking lot. At that time he was backing up from his parking space. Then he saw a SUV approaching fast. He stopped and horned to warn the lady driver of SUV. The lady didn't stop and hit rear fender of my friend's car. The white lady yelled and din't admit it's her fault. Luckly, the horn caught many people's attention. So there were plenty of witness in the parking lot. Her insurance company paid for repair of my friend's car.