There was a 4:00 NBC network game in the early 80s that was super questionable. It was the last game of the day and was playing long (no SNF back then). I had some wagers in play including that game and noticed with interest all of the favorites had covered that day.
My team (also the favorite) was threatening to score late in the 4th quarter and would have covered with a field goal. I was pretty excited and ready for this team to score.
They were on the opposing 20 or so and were called on a really quesionable play which set them back to the 35 or so. Next play they were called again on another questionable penalty. Back to midfield.
Next play yet another penalty, back on their own 40 or so. Three extremely bogus call ii a row that took them out of field goal range and they were not able to recover from and failed to cover. Last game of the day, the only non favorite not to cover.