[just another ref]

Originally Posted by splitveer

So as an official what do we do if the horn goes off during a live ball. Do we ignore the horn and expect the players to keep playing? Do we blow the whistle because the horn went off (which is what we did, but it was after the shot)?

Depending on what's happening, sometimes you can keep going, but often it is such a disruption that you blow things dead and start over. Luckily, in your situation it was after the shot, which sounds like it was a good time to reset. Certainly no reason not to count it.