I saw this question posted on an American referee Facebook group. There has been a lot of to-ing and fro-ing in response. May I know what peoples thoughts are on this
"So the thrower lifts a back foot in follow-through. It is called a foul throw. However usually it has left their hands and crossed the line before the foot is lifted. Therefore the throw is actually legal? I honestly don't know. By the letter of the law the throw is legal as both feet were down when the ball left their hands. What does everyone else do?"