Visually impaired triathlete pushes own limits

It's one of the most grueling races in the world where athletes are pushed to their limits.There's the one mile swim through the ocean a bike ride up and down a volcanic mountain and a run across treacherous terrain.Now imagine doing all of this blind.Meet Bobby McMullen. He's completely blind in his left eye and the vision in his right eye is 20 over 1200."It's like looking through a toilet paper roll with Vaseline on the lens that would give you an idea," said Bobby.

But that hasn't stopped bobby from doing what he loves which is racing. So this fall, he decided to take part in the Xterrra world championships. His friend Mark Shaw would be his guide.Mark says that the downhill part was pretty scary because everyone was falling. He says it was a relief to get off that mountain."We finished the bike course and Bobby was in one piece. I was like ‘yes’," said Mark.After the bike ride came the run. They'd run arm and arm like this...which, I found out is very disorienting.Now bobby hasn't always been blind.

He lost his sight when he was 29 as the result of type 1 diabetes. He's also undergone a kidney and pancreas transplant. And yes, he's taken many falls but he says you've got to keep on going."I've had a lot of problems with gravity. I've met the earth head on but I think the important thing is to get up and dust yourself off. Like everything--transplant, visual impairment--you get knocked down seven times you get up eight," said Bobby.

That day in Hawaii the pair would finish last, they did prove that anything is possible."For him to be the first visually impaired athlete to attempt it, let alone finish it, it's a fantastic feeling of elation and pride,” said Mark"It was magic. It was magic," said Bobby.