The best and worst of "Mental toughness" in Sport

Steve Waugh is perhaps the best example in the sporting world of mental toughness I can think of. The countless times he got his team out of trouble through playing the game out in his head, keeping calm and getting the job done.
Daniel Motlop on the weekend was a classic example of the opposite. He was never going to kick the goal after his wincing when the final siren sounded. He didn't want to be there. I've never seen a better example of the game being played out in the mind. To be fair, he had a very good last quarter and I'm not sure many others on the field could have taken the mark he did to give himself that opportunity, but it goes to show how important psychology is in sport.
Can anyone think of any other good or bad examples of mental application in sport?
Daniel Motlop on the weekend was a classic example of the opposite. He was never going to kick the goal after his wincing when the final siren sounded. He didn't want to be there. I've never seen a better example of the game being played out in the mind. To be fair, he had a very good last quarter and I'm not sure many others on the field could have taken the mark he did to give himself that opportunity, but it goes to show how important psychology is in sport.
Can anyone think of any other good or bad examples of mental application in sport?