A method for linking human subject simulation programs to animation programs is presented. The simulation of a human subject is briefly reviewed the link method is then discussed in detail together with its utilization in the kinematic analysis of the subject/vehicle collisions. The limitations of animation are shown for a small computer and methods for circumventing these in human subject animation are discussed. This method has been shown to be useful for automating an animation. It makes possible more analyses in a given time, which means it is more cost effective. It also allows rapid kinematic analyses when the key issues are those of motion constraints and no loads are required.