Whether it is a vehicle striking another vehicle, a vehicle striking a fixed object, or a vehicle striking a pedestrian, analysis often begins with an accident reconstruction. If a pedestrian is involved in an accident, the analysis of the collision often entails collaboration between the accident reconstructionist and the biomechanical expert, who studies the nature and specific cause of any injuries. As an example, in one case our accident reconstructionist determined the speed and braking profile of the incident vehicle. The biomechanical expert analyzed the directionality and location of the lower extremity fracture sustained by the pedestrian, which showed from which direction the pedestrian was darting at the time of the collision.