I think one thing that didn’t really get mentioned was how Detroit gained some serious momentum with how they approached that game in SF. Didn’t really have anything to play for, had a zillion injuries coming in, and still chose to play their starters. Had to fight back after being down, and their defense, which was terrible, made the plays to win.
Looking back, that should have been an ominous sign. They approached that entire situation in what seems like the perfect way.