…refers to psychological momentum.
Turnovers hurt your defense psychologically and give the opponent a mental edge. For the defense, they had just come off the field after those first two fumbles. There’s a deflating feeling when that happens. But for the opposing offense, they feel euphoria. They come in with a free set of downs looking at the end zone.
Boise came into the game knowing in the back of their minds that they had a good chance of losing. After the first fumble and TD, they got hope. After the second, they knew they had a good chance of winning. After the second fumble by Lopini, they knew it was their game to lose. I could see their body language change on the sidelines.