Game SummaryFollowing their fierce divisional road win over the Titans, the Colts flew to Reliant Stadium for an AFC South duel with the Houston Texans (who were the last team Indianapolis lost to en route to their Super Bowl championship).  In the first quarter, the Colts trailed early as Houston WR Jerome Mathis returned a kickoff 84&#160;yards for a touchdown. QB Peyton Manning completed a 2-yard TD pass to TE Dallas Clark.  In the second quarter, the Texans would retake the lead with kicker Kris Brown getting a 33-yard. RB Joseph Addai helped Indianapolis get back ahead with an amazing 4-yard TD run. In the third quarter, the Colts pulled away as kicker Adam Vinatieri got a 36-yard field goal, Addai got an 8-yard TD run, and Vinatieri kicked a 28-yard field goal.  In the fourth quarter, Houston tried to catch up with RB Samkon Gado getting a 1-yard TD run, while Indianapolis got its final score of the game with a Vinatieri kicking a 35-yard field goal.  The Texans would get close with QB Matt Schaub completing a 1-yard TD pass to RB Vonta Leach. The Colts held on to get the victory.
Question: How long was the longest touchdown run?
Answer: 8-yard TD run