Jason McCaffrey, the winner of the 2009 Weymouth Speed Week, has broken his neck in four places but was sent home with only painkillers by doctors of the Dorset County Hospital, Dorchester, UK.
The kitesurfing champion had a serious accident in Portland Harbour, but the hospital professionals said he hadn't broken bones.
Three days later, McCaffrey couldn't handle the pain, and the four broken vertebrae and a cracked sternum were only detected at the Royal Victoria Hospital in Ireland.
The 38-year-old European kitesurfing star has already undergone delicate surgery to get him back to full recovery.
Jason McCaffrey was kitesurfing when his board strap broke. During the accident, his chin cracked the sternum, and the injuries followed.