I watched Cook his entire college career and I don't think I ever saw him once drop a ball. But he has dropped way too many big throws in the NFL. Just a terrible job there at the end of the half.
On a side note, I have been saying it all season that Allen is at his very best when you spread the field and allow him to be the running option when the defense allows for it. The no huddle gets him into a rhythm and allows him to be him. They haven't done it this season for more than a handful of plays, but I come out of the half the same way we went into it. Play fast and free and let Allen use his instincts and not allow him to get in his own head. Let him run when he sees it and throw it when it's there. Just see what happens.