Sometimes, everything is going as planned. You are ahead and you have the ball. All you've got to do is hold onto the ball. Get one more first down. Get a stop on 4th down. Any stop. Easy peasy.
Sometimes 4th quarter Arkansas and Tennessee just got to look around the corner of the truck to see what the noise is because you trust your defense. Then a flying raccoon pwned you. Don't be 4th Quarter Tennessee and Arkansas.