Brake checking motorcyclist gets instant karma - GIF

[joeljensen]

If you watch carefully, the biker's helmet gets larger in the video just after moving in front of the car.
Also, relative speeds at passing show the cycle moving faster than the car and still accelerating as it moved in front. If the cycle had stopped accelerating and stayed constant speed, the car would not have hit the bike that soon (even if the car sped up). Car does not show any tilting to additional acceleration until as the brake lights come on.

I am sure any modeling would show in this case, bikers fault.

Others? depend on the situation.