Exceptional cricket. That is how you exploit a weakness.
At 108-2 chasing 222, South Africa seemed untroubled, but there was a spot on their face. It was very small, but it was there. With the dismissal of Jacques Kallis, they gave it a little bit of a scratch and took the top off it, drawing a faint speck of blood.
What New Zealand did then was magnificent. They sawed off Mount Everest, tipped it over, inserted the tip into that blemish and pushed. Bringing the field in, surrounding the South Africans, they pushed and they pushed and they pushed until that tiny break in the skin was a wound and then they pushed some more until South Africa split in two.
That is how you win big cricket matches. Full marks to New Zealand. References to South African mental frailty do them a grave disservice.