Few if any saw this coming.
It's not even that Marquez knocked Pacquiao out. Though this is a little surprising since Marquez isn't known as a devastating puncher and Pacquiao hadn't been stopped in over 13 years.
It was the sheer suddenness and violence of the knockout that left most of us stunned.
Juan Manuel Marquez landed a shot for the ages. A missile of a short right hand that landed square on the button and ended the fight the second it connected.
In those few moments between the shot landing and Manny Pacquiao finally beginning to move again, the happiness one felt for Marquez finally getting his vindication was tempered by concern for the fighter.
It was concern for a fighter who has given so much to the sport, entertained so many and accomplished so much, but who now faces an uncertain future.
Nobody is inside the head of Manny Pacquiao and he will ultimately make his own decisions. But let's analyze what some of his options are going forward after this devastating loss.