mate in one
Maybe this kind of thing only happens once in a lifetime, but it's enough reason for me to choose to manually promote to a queen in live games.
The proficiency of both players seems to come into question...Black (for allowing that to happen) and White (for getting such a position against someone who would allow that to happen).
The proficiency of both players would come into question for the less subtle reason that they managed to play almost a whole game with a black bishop starting on the wrong square.