This 364 x 480 pixel image illustrates that since 1968 the leading theory of fly-ball catching has been the optical-acceleration-cancellation hypothesis, which holds that the fielder must run under a ball in such a way that it appears to be moving upward at a constant rate. If the ball appears to be accelerating, it will land behind you; if it is decelerating, it will drop in front of you. This method has stood you in good stead--hey, you've got the Golden Gloves to prove it. But wait! A recent article--in "Science," no less--has proposed a different and perhaps superior technique.