Check this from Get The Picture.
Now I'll tell you something a friend of mine noticed Saturday. When Joe Cox raises his arms (horizontally, almost as if he's asking the crowd to quiet down), we're going to run the ball.
I assume it's some sort of a silent check into a pre-determined run play. But, regardless, every time I saw him do it before the snap against Kentucky, we ran the ball.
Probably not something a guy named Colby should be able to pick up from the student section.