I saw the incident happend to that Gti. Actually, the Gti was made a silly mistake by changing his position from left to right lanes after following the Toyota Unser that drove at 60km/h. There was a 8 cars on the road at that moment and drove very close from each others. The Gti was made a stupid Zigzag speed from left to the right lane at 80-100km/h and able to bypass the wira infront of me. His is very proud but it was ended in a few second as soon as the wira infront of Gti had made an emergency break without any reason (ladies driver). The Gti was lost control and bang into the wira back bumper and got bang with the the wira at his car butt. At the same time, the Gti was tried to minimize the impact by pooling his car from right to the left lane and very unlucky to him as he was hit the back of the Toyota unser. I'm thanks to my new F1 tires that i just fitted to my car and able to skip from a second of disaster.
Note: Do not drive too slow and Do not drive too fast. TQ