These were small images of birds and squirrels that moved around on a sort of endless chain arrangement. Clayton, the man in charge of the gallery, set the machinery in motion, and the painted effigies began to go around. Bart raised the rifle--a repeater--to his shoulder, took quick aim, and fired. A bird was knocked over, then a squirrel went down, and, in rapid succession he repeated this until he had fifteen hits to his credit, out of a possible sixteen.