You’re a linebacker. As the offense snaps the ball, you notice the offensive line move forward to run block — there’s even a pulling guard. You see the quarterback turn his back to you and reach the ball out to his running back. You know it’s going to be a run so you start to charge forward. But then the quarterback pulls the ball away and sets his feet to pass. You’re now out of position to defend the pass properly and there’s an open lane behind you that a receiver sneaks into for an open play in the middle of the field.