Corrected entry: When Denzel meets up with the woman with the shopping cart close to the beginning, he walks through a tunnel. It shows a few shots of him and the woman talking; during some of these shots, the entire tunnel disappears from behind him.
rswarrior
3rd Aug 2010
Correction: It's an overpass, not a tunnel, and the approaches from both sides have been destroyed/eroded leaving only the arch. The different angles wouldn't always show the arch.
rswarrior