Mobility. That's the first thing everyone keeps coming back to when they identify the one skill Vikings rookie Christian Ponder has that can make him a big-time threat on this level. Ponder has quick feet and good instincts. He has a knack for extending plays.

Vikings offensive coordinator Bill Musgrave said Thursday that Ponder may have some John Elway-like scrambling ability in him. Adrian Peterson called Ponder "a younger Steve Young." Yet, coincidentally, Ponder's quarterbacking counterpart this Sunday at Mall of America Field will be a guy who has learned to use his dangerous mobility quite effectively.

Green Bay's Aaron Rodgers may surpass 1,000 rushing yards for his career Sunday against the Vikings. (He currently has 993 yards). The Packers leader also has 15 career rushing touchdowns. But more than that, he's consistently had a knack for knowing when to run and when to stay in the pocket and has shown great savvy in extending plays.

On his weekly radio show this week in Wisconsin, Rodgers' addressed his mobility, including several plays he made with his feet last week, most notably a 7-yard touchdown pass to Donald Driver.

Said Rodgers: "A couple of runs in the game [were] just reaction plays. I think those are the most effective. It can't be a design. It can't be you immediately tuck the ball. Your eyes have to be downfield. You have to make the defense believe you can throw it and sometimes you do, like the touchdown to Donald. You extend a play; you move. The defense has to react and respect your running ability and then Donald makes a great second reaction and we score a touchdown.

"In the pocket sometimes it's a feel. You really use different tactics. Sometimes you can hear the crowd get a little excited and it's a split second thing. But you know you're about to get drilled. Maybe you slide quickly. Or sometimes you just feel the left side or the right side collapse and you may need to move a little bit. Then sometimes you close your eyes for a second because you think you're going to get drilled, and you open them and you have a chance to move to your right and make a play and it happens. You've got to be honest about that. Sometimes it is just fortunate."

Ponder should keep his eyes open this week. He might be able to learn a thing or two from Rodgers.