Thats is because Bonds says "chop down" and Bonds says he will undercut the ball.
So when you tell kids to swing down, yet keep the hands above the ball?
Can the barrel move down while the hands stay above the ball? I do not tell kids to swing down. I tell them to attack down to behind the ball with the barrel. This is off of a tee. During front toss. I just say be as short and direct to the ball with the barrel.