Following the release of Borat 2 this past weekend, Sacha Baron Cohen visited as a guest on A Late Show With Stephen Colbert, and during the interview discussed how everything nearly fell apart in the bit with Rudy Giuliani. According to the actor, the idea for the set up was that he was hidden away in a custom-built wardrobe, set to jump out when signaled via text message by director Jason Woliner. There was just one problem: his phone was nearly dead. Said Cohen,
Article source: https://www.cinemablend.com/news/2557918/borat-2s-rudy-giuliani-scene-nearly-fell-apart-due-to-technical-difficulties