Alternating Possession Arrow.

This is a situation that I have been unable to find the correct solution for. As far as alternating possession throw-ins go, the arrow gets reversed when the throw-in ends or if A commits a violation. If there is a foul prior to the throw-in ending the arrow is not reversed and A would still get the next alternating possession throw-in.

My question is what happens if the ball is kicked by B before touching anyone legally in bounds? Because 4-42 art.5 states that a throwin ends in three different ways:

1. The passed ball touches or is legally touched by another player inbounds.
2. The passed ball touches or is touched by another player out of bounds, except as in 7-5-7. End line throwin following a goal or awarded goal.
3. The throw-in team commits a throw-in violation.

The only thing in that that might cause me to think the violation technically occurs after the throw-in ends is that it says the "passed ball touches or legally touches" in the first list item.

Please let me know how you guys would handle this situation.