Let’s try to walk through everything that happened in the last few minutes of the OSU-Central Michigan game. Oklahoma State led 27-24 with a few seconds left on 4th down from the Central Michigan 41.
Mason Rudolph dropped back and heaved a ball downfield to nobody. See here.
Time ran out on this play. The clock read 0:00. Everyone was on the field. OSU had escaped 27-24. Except that there were penalty flags. Rudolph was penalized for intentional grounding because he had thrown the ball downfield instead of just running around through the back of his end zone and running the clock out.