Except for the bat, this actually happened in a game involving SMU. I don't recall pre- or post- death penalty, but it was a Southwest Conference game. What happened was a kickoff where the ball was line drived into an upback Team B member, then came back toward Team A's goal line. In a mad scramble for the ball, it gets moved back toward the goal line and finally goes OOB behind the goal line. Safety.
Difficult explanation to be sure.