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Ryan Reynolds was, just for a moment, actually buried in the shooting of the film's climactic moments. The production crew had a team of paramedics waiting on standby.
Ryan Reynolds stated that he suffered from claustrophobia towards the end of filming (much like the character he is playing). This was mainly due to the fact the coffin he was in was gradually filled with more and more sand as filming went on. He describes the last day of shooting as "unlike anything I experienced in my life, and I never ever want to experience that again."
Shot in seventeen days in a Barcelona studio.
The phone number of the Chicago F.B.I. field office, mentioned in the movie, is the number of the office in real-life.
Shot in sequence.