Sensors at the midway point of the table detect the angle, speed, and trajectory of the not-exactly-oncoming puck, and instructs the mechanism how and where to fire the disc -- you slap it back, and the same sequence happens on your compadre's end.
This adjustable table allows users to change the angle and height position of the Table PC, from lying flat to a straight-up, 'wall-like mount' at 90 degrees.