Understanding the dynamics involved in a vehicle crash is paramount in reconstructing the event. An expert must differentiate between a “central” and “non-central” impact, and how the vehicles react to one another as a result of this alignment. Furthermore, they must also understand the concept between effective mass ratio, and the terms center of mass, versus centroid of damage area. Our experts have often employed the use of heavy equipment to reposition two vehicles exactly as they were when they met at impact. These efforts have been extremely instrumental in identifying the direction of force vectors, essential in a complete and thorough reconstruction.