Bmw reacted not knowing how fast the cars behind were coming, can't knock him really. As said its a blind bend he saw a flag and cars stopping in front of him, he hit the brakes. Scoobys behind was travelling a lot faster than him, reaction times distance travelled ect is a lot greater. Hence the accident. Nobody was at fault it was an accident.

Black scooby was so lucky, blue scooby was very well driven. Most including myself would of hit 1 of the 2 cars or the barrier.