Disallow the Goal?

[Jumpshooter40]

This is a play that happened in a 3-on-3 game between some Old School work buddies down at the park after work last night.

A1 makes a short jump shot which passes thru the hoop. As the ball is traveling downward thru the net, and is probably 2/3 of the way thru the travel, player A2 contacts the net. The ball finishes traveling thru the net and exits downward, falling on the ground for an apparent Team A victory. Team B self-designated captain, protests that this was illegal contact with the net, and the goal is disallowed and a violation is called on Team A, giving Team B the possession out top.

What is the correct call?