AP throwin puzzler

[Mark Padgett]

My new issue of Referee Magazine arrived yesterday and it had an interesting case in it. They have a story of how case interpretations have changed over the years due to rule changes. It is really interesting. Anyway - here's the case: A1 to inbound on AP throwin. A1 holds the ball over the court. B1 grabs the ball with both hands and there is dual possession with A1 still standing OOB. What happens to the ball and what happens to the AP arrow?

Don't cheat and look in the magazine