Australian cyclist Stuart O'Grady will be released from a Spanish hospital on Wednesday after collapsing during a 'hot lap' of the Valencia MotoGP circuit last Sunday.
O'Grady collapsed and suffered a seizure soon after the high speed thrill ride on a Ducati MotoGP bike.
He said the stress of the experience on his body probably triggered the seizure but doctors have since given him the all clear after three nights in hospital.
"When the ride finished of course I could feel my heart rate soaring, my blood pressure rising, but I didn't give it much more thought," O'Grady said.
"But then I started having blotchy vision and 20 minutes later I had a seizure and collapsed."
"It was possibly the extreme 'hyper tension' or maybe an old scar on my brain from one of my previous crashes but there's no use speculating or guessing, it's happened and that's that."
Prior to the ride O'Grady, who rides with Team Saxo Bank, underwent medical checks and was cleared to participate.
"The ride around the Valencia circuit was unbelievable," said O'Grady who rode pillion behind former MotoGP rider Randy Mamola for the hot lap.
"I've jumped out of planes, been in a Russian fighter jet, a V8 Supercar, the works - but the twin seater Ducati blows them all out of the water."
"I have never come close to the experience of hanging on for your life."
"The braking on those bikes had my feet coming off the rear pegs, and my butt way off the seat, the acceleration meant I needed my full strength to hang onto the machine and not get flicked out onto the track in front of 90 thousand fans," he explained.
O'Grady, one of Australia's most decorated cyclists has previously won the 2007 Paris-Roubaix, two stages of the Tour de France and has gold medals from Olympic Games, Commonwealth Games and World Championships in his trophy cabinet.
He was also awarded an Order of Australia Medal (OAM) after his gold medal performance at the Athens Olympic Games.
