After being hit by a truck, Davis Dai Kim-ping awoke from a two-day coma to learn he'd lost his right leg. He would never run again, doctors said. He was 11 years old.
That was 29 years ago, and Dai has been defying the odds ever since. Not only does the 40-year-old run, he swims, rows and cycles. He has represented Hong Kong in international competition three times. In 2002, despite only swimming for a year, he competed in the Far East and South Pacific Games for the Disabled in South Korea. In 2006 and 2007 he raced in the World Rowing Championships.
But of all sports, it's running that's captured his heart. He's taken part in the Standard Chartered Hong Kong Marathon every year since 2004. Last year, he became the first local amputee runner to compete in the half-marathon.
I was in Tsim Sha Tsui celebrating a friend's birthday on the same day as the Hong Kong Marathon.
The street was full of all different kinds of runners, including some who were disabled. That scene made me realise I could run with them, too. So I started to run to simply see if I could. I wanted to test my ability.