The video covers investigation of vehicle-related evidence with an interesting twist. What was that unusual factor? What about it makes doing the CSI work difficult?

The unusual factor is the Exploding Projectile that is hidden under the ground or in a hole that is activated when a vehicle passes by or goes over it and it kills people within the vehicle with copper plates that shoot into the car and destroy everything within its path. The CSI has to determine what type of exploding object was activated and its location.