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					Originally Posted by  billyu2
					 
				 
				a.  illegal 
b.  illegal 
c.  legal if dribble was interrupted 
 
In a and b when you say A1 "retrieves" the ball, I have to assume he has control.  Pushing or throwing the ball to the court constitutes a dribble.  Returning to the court, "grabbing" the ball and dribbling again would be a violation.  He could "continue" the dribble as in c without violating. 
			
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 a. Is legal. Player retrieves ball..momentum carrying him OB. Player  pushes ball to floor. That’s all it says. Legal. 
Your applying facts of sit b. No returning to court, grabbing ball and dribbling in sit a.