The Steelers were holding on to a 10-7 lead near the end of the first half when the Cardinals Karlos Dansby intercepted a tipped Ben Roethlisberger pass at the Steelers 33-yard line. Cardinals quarterback Kurt Warner moved his team into scoring position with completions to Tim Hightower, Larry Fitzgerald and Anquan Boldin.

With the ball at the one-yard line and just 18 seconds to play in the half, the Cardinals were anticipating Ryan Shazier and William Gay blitzing, but Harrison gambled and dropped back in coverage and intercepted Warner's pass at the goal line.

What happened after that, nobody could ever have expected. Harrison headed up the sideline, following his blockers and evaded would-be blockers for a 100-yard touchdown return and 17-7 Steelers lead going into the half.

"I got the pick," said Harrison after the game. "You know we had them matched up and it was kind of like, give it time, and I slid over to the right and he threw it right to my hands, and I took off. I was just trying to get to the other side, and score seven. It was about my teammates helping me get to the other end. Will and determination to try and do what you need to do and help the team win the game.