The Vikings kicker proved that he has the leg for a 70-yarder when he nailed one during warmups on Saturday. Sure, Walsh wasn't wearing pads and no, he didn't have anyone holding the ball -- BUT HE KICKED THE BALL 70 YARDS, OUTDOORS, IN MINNESOTA.
Raiders kicker Sebastian Janikowski hit a 70-yarder in warmups once, but he did it in Denver where apparently everyone can make a 70-yarder, at least according to Ravens kicker Justin Tucker. Janikowski's kick was impressive though because he did it with a snap and a hold.
The longest field goal of Walsh's NFL career is 56 yards. He probably didn't even have to try on that one.
Here's the 70-yarder Walsh hit on Satuday before the Vikings played the Cardinals. Walsh hit two field goals (21, 34) that weren't from 70 yards in the first half against Arizona. Walsh also missed a field goal in the first half when he hit the left upright from 51-yards, but he probably did that on purpose.