Did you not see that big ole' hole that Smith ran through, that was space. And you're talking about He's too light in the pants, yet we had 2 220+lb RBs out, and Chaney tapped out a few times during the game.
Props to Smith, but Johnson wouldn't have been hawked down on that run...Johnson would've housed that counter to the left where Chaney got shoestring tackled, too.