1. The film prototype Alan Roston once shot himself a day's life diary when he was stuck in the canyon. He had only shown this image to his best friends and family members, and he even stored it in the bank’s underground vault to ensure its safety. Before the filming started, Danny Ball and James Franco were fortunate enough to have permission to watch this recording so that they could truly and accurately portray Alan Roston's situation in the film.
2. The film premiered at the Toronto International Film Festival on September 12, 2010. It is said that due to some bloody scenes such as amputation, many viewers at that time nauseated and even fainted on the spot. At the Telluride Film Festival, two viewers also went to the hospital after watching the film. One was diagnosed with syncope, the other was diagnosed with excessive fright, and both of them were watching the film "amputation surgery". "The above reaction occurred after the scene.
3. James Franco is not the first candidate to direct Danny Ball. Ball originally planned to let Cyrian Murphy play the role of Allen. Sebastian Stein and Ryan Gosling are also both Was under consideration.
4. The camera used by James Franco in the film is the same model that Alan Roston used when he was trapped.
5. The crew prepared a variety of hand props for the amputation operation. The director originally planned to spend a day and a half to shoot the amputation show. The amputation show lasted 3 minutes in the film, but in reality, Alan Roston took 1 hour. Time to cut off the right hand.
