Displacing player into shooter

[Buckley]

While A1 is shooting a layup, B1 displaces A2, knocking him into shooter A1. B1's actions warranted a foul but were not intentional. The play affected the shot, and the shot did not go in. What would you have?

We had the play last night and awarded the ball out of bounds to team A, since they were not in the 'bonus'....however, we discussed the play thoroughly after the game and wondered if justice was done to the shooter since it did in fact affect his shot.