Pressure does funny things. And Australians are masters at ratcheting it up. I remember India vs Aus in 2001 - last test in Chennai, we needed 150 odd to win, were around 120-130 for 2, and ended up losing 6 more wickets, finally just scrambled home to win by 2 wickets. Harbhajan had to score the winning runs. One of those times, like this, when the win is all that matters, not how it came.