The first motion studied was one that simulated a vehicle stop where the suspect has a weapon hidden beside the right thigh/next to the console and shoots at the officer as the officer approaches the driver side doorpost. The subjects were instructed to hide the gun by their right thigh, then on their own initiative to move the weapon from the right thigh position, across the body, point it slightly over and to the rear of the left shoulder and discharge the weapon. They were instructed to do this as quickly as possible.