The helmet picked up the ball as it left his hand. In an instant the computer dropped a box around it, then drew a line straight from that original box to a point low and tight across my knees. A series of green boxes then plotted the course of the ball as it actually came in. The direct line readjusted itself as the ball began to break, but by the time I'd seen and tried to digest all the information, the pitch thudded into the batting cage.