They're starting this new thing this season where they want the crowd to do a chant when the team gets a first down. It's from the movie 300. After the announcer says who made the play and for how many yards, he will always say "First Down!". That's when they play the sound on the speakers and we're all supposed to chant:
"Ahh Ooo! Ahh Ooo! Ahh Ooo!". Which is supposed to sound like this (at :35 seconds)
The first preseason game it just seemed odd, but during the SD game I figured out what was going on. I'm hoping that if it catches on, it might give people something to focus on and stop them from cheering when the team is lining up for a play.
[ Edited by StOnEy333 on Sep 10, 2012 at 8:48 PM ]