Interesting video question

[jTheUmp]

This is going to fall under Points Not Covered In The Rules.

When the game resumes:
If the rim broke during a free throw, I'm allowing a replacement free throw.

If the rim broke during a non-free-throw try, I'm going to the arrow

I realize that's a bit inconsistent, but it feels like the right way to resume the game.

If the rim can't be replaced or repaired, move to another gym/court (if available), or suspend the game and let the Powers That Be figure out if/when it'll be resumed.