Dom Di Tommaso -- aka Dom Tomato -- and his best mate Marx Masters are parkour pros, known for pushing their bodies to the limits to execute incredible feats of athleticism.

Ahead of the race, Dom said he had tried to turn everyday actions into race-like challenges. "Every time I went to my bike lock, I tried to make sure I was doing it in the smoothest, fastest fashion, hoping tiny things like that would give me some sort of advantage in the game," he told 10.

The freerunners were also competition frontrunners in the early stages of The Amazing Race Australia, but on Sunday night, that momentum came to a crashing halt during a Detour challenge in the remote region of Tersak in Uzbekistan.

"We had been on the podium, in the top three, every single leg of the way, so we kind of just thought it was going to be rinse and repeat," Dom added. But during a detour where they had to roll balls of salted, strained yogurt, they struggled to get the right consistency and ultimately chose to take a time penalty instead.

"That blind confidence that everything had been going so well so far, we thought we could just keep digging in and trying to go as hard as we could," Dom said. "But, if you make enough mistakes, the hard work doesn't compensate for that loss... and, as you've seen throughout the race, sitting still is not really our forte."

Facing a choice between cleaning sheep intestines in a nearby, freezing stream or rolling 50 of the balls, Dom and Marx chose the deceptively simple balls, but soon realised they weren't going to be able to get very far.

"I don't think it was really even an option [to continue], by the time we got to where we did with the balls, I had done an entire plate wrong," Dom said. "We had gone through all the salt and barley, all the things that were there to dry out the balls.

"We almost took the time penalty later than we should have because we kept trying to finish the task as best we could, but it got to the point where I would have been rejected for my entire plate, and Marx had like five done because he was losing the technique," he continued. "it wasn't really a choice as much as an inevitability."

Taking a time penalty, Dom and Marx hoped to rely on their athleticism to give themselves enough of a head start ahead of the other teams to negate the penalty and keep themselves in the race.

"A lot of the other legs we've had there was a bit more travel time between the challenges, but this time, it was all quite in a close range," Dom explained, "so it was really tight all day. Once we sat on that bench, it was a little bit of hope, but a lot of it was acceptance and reflection.

"If we made it through, it would be on a hope and a prayer, and not because we had made it comfortably," he added.

Though they arrived at the Pit Stop mat in fourth place, Dom and Marx had to serve out a 30-minute penalty, watching as the remaining teams checked in. With just seconds left on the clock, the final team -- Lindy and Stella Klim -- jumped onto the mat and secured their spot in the race.

"When Lindy and Stella arrived, we were really happy to see they had made it through another day," Dom admitted. "With a lot of the people on the show, we connected very closely, and so, as much as you want to win, you also want to see your friends do well and win for their charities.

"When we realised our time was done, it was kind of like an off switch, where suddenly the game intensity went away and you're not in that competitive mode. You get to sit back and really appreciate all the experiences you just had," he said.

Though the pair's time on the race came to an end, Dom said he couldn't think of anyone else he would have attempted the challenge with other than Marx.

"We've lived together, worked together as garbage men, done parkour together for years, working on video shoots and all sorts of different things together," Dom said.

"We've always had this kind of seamless relationship where, if one's getting stressed, the other one's very patient. We seem to balance each other out quite well, and that felt like it was on hyper-mode when we were on the race.

"I feel very fortunate to have a friend like Marx in my life, that we have that sort of relationship where you can spend 24 hours a day, seven days a week. Most people find me quite annoying, and he's said he never has. I think that really says a lot," he laughed.

Dom and Marx were competing in the race on behalf of the National Breast Cancer Foundation, an organisation that's very close to Dom's heart.

"For me, the NBCF isn't just a charity. It's very closely intertwined with my family, so I feel like I was racing on behalf of my family and trying to help as many people as I could.

"That's why I promote and share my parkour, to try and promote the sport and all the healthy things that come along with it. To get people involved and learning those lessons, it's the same as competing for charities. I'm trying to win that money to really help a good cause, and that personal connection to my family makes it that much deeper.

"If I was able to contribute that much to the National Breast Cancer Foundation, that's a substantial jump forward we could be takin with that research. For me, that was the biggest motivator for winning.'

The Amazing Race Australia: Celebrity Edition continues Sundays at 7pm and Mondays at 7.30pm. Watch and Stream Free On 10.