1. Out Obstructing the field
Either batsman is out Obstructing the field if he wilfully obstructs or distracts the opposing side by word or action. It shall be regarded as obstruction if either batsman wilfully, and without the consent of the fielding side, strikes the ball with his bat or person, other than a hand not holding the bat, after the ball has touched a fielder. See 4 below.
This is the law, and the part in bold seems odd. What does that mean? Sledging? Or does that mean he can't yell out 'DROP IT' when the ball is in the air?