But instead of talking safety, he started to describe ways to dodge the 12-hour shift pattern. "I do doubles - you can get away with it," he said. On a bad day, I calculated, that meant the man in charge of safety had not slept for up to 24 hours. Shortly after 10am we arrived at the site. Ryan gave me a short safety briefing, then assured me he was not working a double shift. Ryan warned me: "If you see a train, don't panic and never run. Stay calm." I asked if he had had any near misses. "Loads," he replied.