You can't run down 21 in the 4th. The fake punt forced Duncanville to pass. Mathis wasn't dumb. He knew his defense wasn't going to stop Duncanville, so he had to keep scoring.
OL
He scrambled pretty well and bought time.
No it wouldn't have been. If these two played again, you'd get a high scoring running affair with either team winning. Turnovers and a couple of big plays would decide the game like last night.