I was using it during play. The gym did not have a team foul indicator on the scoreboard, and one team was holding for the final shot of the period. I knew the defense was at 6 fouls, so I used that signal.

I had asked this guy to stick around and watch our crew, as he had just finished his game. He asked me what was with the "hook 'em horns" signal. I told him and he said don't do that. No alternative or explanation given.

To be fair, I had just finished watching NBA playoff ball and that was a signal I saw them using in those situations. Probably not the best idea to incorporate signals from the NBA game.