one in four years

[JeffTheRef]

Such as they are. They are not proscriptive on the point under consideration. 'Continuous motion' is meant (I'll bet)to prevent the defense from unfairly taking away shot opportunities, not to turn horses (balls knocked out of a player's hand(s)) into zebras (blocked shots). What if, as often happens, the ball is batted out of the player's hands earlier in the draw, barely on the way up? Is that a 'blocked shot'?