It doesn’t take much to flip a future book upside down.
One game. Heck, one second, when you look at the second that was put back on the clock at the end of regulation of the Iron Bowl between Alabama and Auburn which allowed the No. 1 Crimson Tide a final field goal attempt. They missed the field goal and it was famously returned the other way for an Auburn 34-28 upset victory as a 10 1/2-point home underdog and +340 on the money line.