Hussey played really well, so did Katich & Haddin, but they made one mistake and that was the end of their innings. This is the beauty of test cricket - you make 1 mistake and you are out. As a bowler, you really have to bowl well (unless its your lucky day) otherwise you will get smacked all around the park.
I still remember in 2004, Rahul Dravid smashed a boundary of the bowling of Stuart McGill to win the Adelaide test match. How can we forget that? and India winning the Perth test after losing the Sydney test due to the most horrible umpiring in modern day cricket. How can we forget that? I belong to the school that believes in "test cricket is the real cricket"...
These days, T20 has resulted in an overdose of cricket, to the extent of causing indigestion. Test cricket has a soothing influence. 50-50 is the unfortunate victim of T20 overdose :-)