Kieron Dyer has revealed that he let out 'years' of frustrations on SAS: Who Dares Wins Jason 'Foxy' Fox.
The ex footballer is one of the contestants on the celebrity edition of the show during which he took part in a challenge that left him with a broken rib.
Dyer, 42, says he then saw the 'red mist' while in another challenge which ended up with him taking it out on poor Foxy.
Fpx had to be helped up by his co-star Ant Middleton after Dyer battered him.
Speaking to the Sun, Dyer said: "Before this challenge, they get you psyched up about your family, who you'd kill for, and then send you in against Foxy dressed in all the red kit and you basically have to think like you want to kill him.
"I just let it out and what was so great about that, what I loved, is that when Ant actually told me to stop, I stopped. I don't think he thought I was going to stop, to be honest."
Dyer went on to say his fellow celebrity contestants were shocked to see that side of him - as he was 'swearing like a madman' during the challenge.
"The scary thing is, why I felt sorry for Foxy is, by this time my ribs were hanging by a thread now, so that's why I was just proper kneeing him in the ribs," he added.
"I was thinking: 'Well, you broke my rib on this course, let me try and break one of your ribs!'
"That challenge gave me a sense of release from everything I'd been carrying for years, 100 percent, I feel lighter, like the weight of the world was off my shoulders."
Dyer isn't the only one who was left injured after taking part in the show.
Saira Khan has since revealed that she was left with 'life long' scars from injuries she sustained during filming.
the 51-year-old said she suffered a broken ankle while wrestling in mud with Ulrika Jonsson, which required a metal plate with nine pins, as well as a chipped shoulder, and had to undergo surgery.
She told the Mirror: "I've never howled like it. I was in agony."
Explaining why she decided to carry on, she added: "I was waving that flag for women in their 50s to go, 'Don't write us off'.
"There was a chip on my shoulder, like, 'I am not going to prove to you women can't carry on if in pain. 'F*** you, I'm going to keep doing it'.
"It was painful... but the adrenaline and shock. Your body just takes over."
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