Director Christopher Nolan cast over 1,000 extras for The Dark Knight Rises instead of using special effects to insert crowds during post-production. Actor Christian Bale explains, "The (extras) came at midnight the night before, just to start getting ready for it - just an enormous amount of people. It's choreographed - to a point. There's a limit to how much you can choreograph that many people... You felt that energy when you hear the people together and battle cries, and it fuels you."