The main setpiece included a bank of 12 video monitors. The feed on those monitors was all pre-recorded and played back via 12 DVD players behind the wall. It took nearly 45 minutes to reset each scene because each DVD in each player had to be reset. Furthermore, because all of these segments were pre-recorded, and included dramatic scenes from the movie, the movie essentially had to be filmed twice: first for the high-angle "security camera" footage and then with the normal cameras once the security camera footage had been converted into a DVD.
