Here's a play you've seen us run a ton, it's an old WCO staple - the slant/flat concept. It's not necessarily a progression read(although there usually is a progression listed) but it's really a "key" read.

I like the formation for this play, it gives CK a clear picture of the defense. We line up both our TE's wide and both WR's inside. Because both CB's are over each TE and you have a S and a LB over the WR's - no matter how much Dick Sherman is trying to show he's playing man, it's zone coverage. Being zone coverage, the QB is going to read the "key" defender on whichever side he chooses. If he plays outside, throw the slant in between the outside defender and before the MLB(Favre ran this play all the time under Holmgren, it's great for strong arm QB's). If the key defender stays inside, throw the flat.

The key defender on both sides shoot outside. This should mean the throw is going to go to the slant.

The bottom of the screen is where CK really should've looked, since the safety was shifted over to the wide side of the field. However, he looked to the other side, away from Sherman and Chancellor.

You see how open VD breaks(I know, the defenders are reacting to the throw, but, I strongly feel that even without that, Wagner didn't really move, so I believe VD would've had a chance to turn upfield for a good gain. It's the wrong throw, even on that side, because of the key defender. However, the receiver is still open but CK airmails it - not sure why the throw was so poor.
Either way, double fail by CK.