Even when he's looking at photos of his bleeding and blistered leg stumps, Oscar Pistorius smiles.
And with his Olympic debut approaching, it's easy to understand why.
Pistorius, whose legs were amputated below the knee when he was a baby, is set to make history by running - yes, running - in the London Olympics. He will be the first amputee athlete to compete at the Olympics, and his journey has been long and rife with hurdles.
When he finally got word earlier this month that he had a place on South Africa's team - his was the last name of 125 penciled in - his first reaction was relief. Then came utter joy.
''I think I woke up the next morning with cramps in my cheeks. I was smiling in my sleep,'' Pistorius said during a recent interview at his training base in northeastern Italy. ''You also realize very quickly ... it's the London Olympics and I need to perform. Very stressful.
''You've made the entrance to write the test, but now the test is in front of you,'' he said.