I was at the game, and have been at every playoff game since. I swear that day was the loudest I've ever heard the stadium. When I say that now during this era, others tell me it's just that I'm used to it now. But I'd been to many home games prior to that one as well, and remember at the time thinking how deafening it was.
I've got some personal video footage of the crowd during pregame that day. At the time I recorded, the crowd was going crazy screaming and waving the towels they handed out that day.
But the reason why I recorded at the time I did was because it was way, way before kickoff. Neither team was out on the field. It was not during player announcements. There was no entertainment or dignitaries on the field. There was nothing going on but the 12s going crazy for each other and the anticipation of the game, without prompting or activity to compel it. It was the coolest thing I can recall from our crowd at any game.