Celebrity SAS: Who Dares Win star Jason Fox is a man whose emotions are not easily stirred.
But in an exclusive interview with MailOnline the TV tough man has revealed that one celebrity managed to do the unthinkable and change his viewpoint entirely, going from appearing 'useless' to leaving Jason 'pretty impressed.'
Reflecting on the most recent season of the show, the former Royal Marine and SBS, 48, revealed The Only Way Is Essex star Bobby Norris won him over and was 'easily the most stand out person who made the biggest improvement on the show'.
While Bobby was forced to leave the show after a brutal challenge took a wrong turn, Jason named him as the contestant that left a lasting impact.
The reality star, 38, was discharged from the Channel 4 programme after sustaining an injury during a wrestling match.
Celebrity SAS: Who Dares Wins directing staff Jason Fox has revealed who was the 'useless' star that managed to win him over on the gruelling show
The former Royal Marine and SBS said The Only Way Is Essex star Bobby Norris (pictured) was 'easily the most stand out person who made the biggest improvement on the show'
Jason opened up about his time filming the Channel 4 reality series, which pushes celebrities to their limits (L to R with fellow directing staff: Matthew Ollerton, Jason Fox, Ant Middleton and Mark Billingham)
During an SAS training event to raise awareness for the Armed Forces charity SSAFA, Jason revealed he did not have high hopes for Bobby to begin with but he now considers him a 'tough guy'.
He said: 'On the last one that has just been aired we had a guy called Bobby Norris on it and I didn't know who Bobby was.
'He turned up and for the first 24 hours he was useless. He cried for about 24 hours, and then I think he rapidly worked out, and also wanted to be there, he wanted to really push himself and test himself.
'He's not the best person we've had on it, but he's easily the most standout person who's made the biggest improvement.
'I expected nothing from him. I found out he was from TOWIE . Now I'm like, he's a tough, tough guy really.
'It wasn't one singular moment. It was just over the course of a few days. I was pretty impressed with the turnaround.'
Jason went on to reveal that when Bobby first joined the intense and brutal show, he had 'a lot of fear and anxieties because of the way he was treated in the past'.
The author and TV personality said: 'It was more the mental side of it that he was going to overcome his fears, because he had a lot of fears, and he had a lot of anxiety around lots of different things because of the way he's been treated in the past.
'He didn't believe in himself. His lack of confidence was terrible and he just pushed through. It was awesome to watch.'
Bobby was forced to leave the show after a brutal challenge took a wrong turn (pictured being seen by the medic) yet Jason named him as the contestant that who left a lasting impact
The former TOWIE star handed in his armband during last week's episode after being advised to withdraw by a doctor after a wrestling match with Love Island star Ovie Soko , 33 (pictured)
Jason continued: 'It's things like that, why I love doing the show because everyone thinks we're just four guys that go on TV and screaming, shouting at people when there's a lot more to it than that.
'Obviously, that's what they show the majority of because it's a bit dynamic and explosive. But for us, we invest a lot into the show.
'We put a lot of time and effort into making sure the course is immersive, hard, but also that we can get people through things that they never thought they could get through.
'And Bobby Norris is something that I'm super proud to be part of like his journey.'
The former TOWIE star handed in his armband during last week's episode after being advised to withdraw by a doctor after a wrestling match with Love Island star Ovie Soko, 33.
After the challenge, the former TOWIE star asked to see a medic immediately and was told he had sustained a serious injury.
The doctor told him he was experiencing neck and spine spasms which were only likely to increase and advised the recruit to go home.
He told Bobby: 'Your mobility is going to get more restricted, and you're going to be at risk of doing yourself more damage.'
Jason reflected on his time on the show during an SAS training event to raise awareness for the Armed Forces charity SSAFA
Jason's comments came during a training session preparing for his next challenge, Fire and Ice, which will see him complete a 500km journey across the Arctic using only wit and survival instincts to stay alive.
He will be joined by three fellow former military men Brian Wood MC, former Marine sniper Aldo Kane and Karl Hinett - who is a survivor of the 2005 Iraq petrol bomb incident.
Unsupported, the team will battle the elements to raise awareness around mental health for the Armed Forces charity SSAFA.
Project Fire and Ice was initiated by former Army soldier Karl.
When the team hit the ice in March, it will be 20 years on from Karl's horrific and life-changing injuries following an attack on his Warrior tank in Iraq.
However, it's not just the physical scars, but the mental battle that Karl had to overcome during his recovery.
Karl has therefore enlisted the support of three fellow veterans, who themselves have also lived through serious mental health challenges due to their experience in the military, to embark on a team challenge – coming with the aim of bringing greater awareness to mental health in the military.
The Montane Lapland Arctic Ultra will take place on snowmobile trails in Swedish Lapland, starting and finishing in the small town of Överkalix.
The 500km Ultra race is divided into two stages, the first of 185km, the second of 315km.
Jason's comments come during a training session preparing for his next challenge, Fire and Ice. He will join three fellow former military men Brian Wood MC, former Marine sniper Aldo Kane and Karl Hinett- who is a survivor of the 2005 Iraq petrol bomb incident (L to R: Aldo, Karl, Brian and Jason)
Following these routes the team will cross twice into the Arctic circle - the land of the midnight sun.
The course can take up to two weeks to complete, by foot or on skis, and many don't make it.
It is a test of extreme endurance set against the harsh beauty of snow-covered forests and icy lakes.
