Don't look at the camera.
And that's what it comes down to. And it's really that simple.
Just in case you haven't heard, when Christopher Nolan filmed The Dark Knight Rises in New York City, which was like the largest amount of extras ever used or what have you for a movie — he used over 1000+ extras.
The scene featured just what you saw in the movie: The Gotham PD escaping from the sewers to take on Bane and his Mercenaries.
However, it dang well didn't seem like a 1000 people were used in the final footage.
And the reason being is because the extras couldn't stop looking at the cameras and having a general good ol' time.
Christopher Nolan filmed the scene with IMAX cameras, and the production staff had to constantly tell the extras to stop looking at the camera and act like they had just escaped after being underground for an extended period of time.
Realistically you are fighting for your life.
However, from what I've been told, the extras - who were getting paid a decent amount (better than if you were an extra on an L.A. movie) - couldn't stop smiling. And we are talking Broadway actors (yeah, you know who you are) here.
So what I gather what took place is that Nolan used IMAX cameras to film this huge 1000 man fight scene, but littered throughout were people awestruck by the camera, which obviously couldn't be put on film.
And there you have it.
The Dark Knight Rises opens in theaters July 20th, 2012 and is directed by Christopher Nolan starring Christian Bale as Batman, Tom Hardy as Bane, Anne Hathaway as Selina Kyle/Catwoman, Gary Oldman as Commissioner Gordon, Morgan Freeman as Lucius Fox, Michael Cain as Alfred, Juno Temple and Josh Pence as a young Ra's al Ghul.
Head on over to the Cosmic Book News The Dark Knight Rises Movie Hub for even more news, trailers and images.