Immediately after releasing a 12-foot jump shot Tuesday night, Spurs center Tim Duncan called out the angle necessary for the ball to bank off the backboard and into the basket. 'Forty-six-point-seven degrees,' said the airborne Duncan, also noting the ball's initial upward velocity of 14.4 meters per second after a moment of mental calculation. 'Two points.' According to team sources, when teammate Tony Parker failed to call out the angle of a bank shot later in the game, Duncan glared at the point guard for the entire fourth quarter. 