Accident Map

The map was attached and I will explain it more clearly. Me is my car, S is my friend's car.
The situation:

Z brake suddenly and S knock his car. I manage to stop on time but X knock me from behind so I knock S car. I don't know why Z brake suddenly. Maybe he saw ghost. S's car was damaged in front but nothing happened at the back. I scratch S's car cause of the car behind. The momentum was too big cause the accident. X's car was also damaged in front but my car seems ok. Estimate the repairing cost will be RM 3-6k because of my new car and also my insurance. Gosh.. The insurance...

Nevermind. Next, Area A. There was nothing there at area A. No accident happened. But after area A, accident occurs. 4 cars also.

After I settle my stuff, I went to help S because I scare her face bad people. After we settle everything, S and I went to check out the second accident. There, terrible than ours. And also windscreens on the road. Luckily no people was injured. After we all discussed everything, S decided to go home. 1 people ask us to wait the police to come but I said I need to go home and eat dinner.

Lastly, I accompany S home. She drive in front, I follow behind. Until we separate..