Countdown | Play 53: Helmetless Jason Witten 

The Play: We all vividly remember the play, right? The Cowboys started the 2007 campaign on fire by starting 5-0 before a loss to the Patriots in Week 6 just before the bye week. Following the bye Dallas went to Philly where Jason Witten created one of the most memorable plays in Cowboys history. Tony Romo found Witten over the middle before he crashed into two Eagles defenders, causing him to lose his helmet. Instead of going down, Witten continued down all the way inside the 10-yard line, helmetless and fired up. And that play will not only live forever, but it likely won't have any company as the NFL has since changed the rule, blowing all plays dead once the ball-carrier's helmet comes off.