Here's a great play, both in play calling from Roman and great anticipation by Kaep.
Here, we're going Play action with Frank out of a 22 personnel look(2 backs 2 TE's) Davis is flexed out to the slot. Boldin runs a DIG(deep in) and Vernon Runs a streak/fade route with McDonald running a crossing route and Frank heading out to the flat. Since Seattle plays the cover 3 so often they use Davis from the slot to run off both Thomas the FS and Maxwell the corner deep, Frank going to the flat pulls the LB as well as McDonald vacating the deep curl area just past the 50 yard line wide open.
Here you see the development of the play a little bit
This is a really impressive play from Colin and the type of plays that are very encouraging. As you see from him highlighted, he is throwing the ball before Boldin is coming out of his break. This means he's anticipating the coverage and play. He makes his read quickly and hits his back foot coming out of play action and drives the ball.
As you see it's a 20 yard gain on a great play call and great execution. This is how the run game sets it all up because the linebackers over the middle hesitate, drop down and then get pulled off by McDonald and Gore. Great play Kaep!