The ball has swung in this match. There has been seam movement, some bounce and good turn. On top of that, South Africa need to win this game. Mark Boucher and Graeme Smith have been the standout batsmen. This is not surprising.
Most players play worse in these situations. A very small number play better. Boucher and Smith almost always play better when their team need them to and with every Test cap they’ve earned, this has become more and more the case.
How would we fare in the same position? Well, we sometimes freak out watching the highlights of matches we know England have won, put it that way.