[jsblanton]

I understand when the ball becomes live during a throw-in. I understand when the throw-in ends. I even understand when a throw-in violation may occur. What I don't understand is if team A is awarded a throw-in,during which A1 holds the ball throught the boundry line plan and B1 grabs the ball. Why is there not an out-of-bounds violation called on A1? I know I am missing something simple. Please help me out.