It's a sick run! Immediately followed by a 10 yard pass reception. But in college he would have made it all the way to the goal line. I watched this video several times, and still am amazed that he was caught.

http://www.nfl.com/videos/nfl-game-highlights/09000d5d81a15727/Best-51-yard-run?module=HP_headlines

Note: This link didn't work for some of my computers. You always get the ad first, but  not always the followup video.