Are you talking about the Dallas-Rams game in 2008? Scott Linehan was the coach but he got fired after game 4. The Rams record at that time was 0-4.
Rams had a bye in week 5. The Rams had an away game against Washington in week 6 and won 19-17. Then they played Dallas at the Dome in week 7 in St Louis and beat them 34-14. Nobody expected that. There were 62,000 people at the game. Fans thought the team was turning things around under interim HC Jim Haslett, but they didn't win another game that season and finished 2-14.