PSK and Expanded Neutral Zone

[Smiley]

In order for PSK enforcement to apply, the ball must cross the expanded neutral zone and the foul must be beyond the expanded neutral zone. But the expanded neutral zone disintegrates when the ball crosses the expanded neutral zone or when the trajectory is such that it can't be touched until it comes down (this is the case on all kicks that aren't line drives). How is this handled when the kick is high and short and hits behind the neutral zone and then bounds across the neutral zone. What if the foul occurs after the expanded neutral zone has disintegrated? This doesn't appear to be addressed in the Rules or Case Book.