There was an original design for the Hunter-Seeker robot assassin, even to the point of a prop being made, but the director decided it was not going to be effective. So the sequence was shot with the actors mimeing the action. Back here in LA, Michael Hoover designed a HS dart in Lightwave, and worked out an animation. Jay Banks, using Match Mover from RealViz, managed to extract camera information from the frames, which were not motion-controlled.