Prince Harry suffered a dramatic health scare during his trek to the South Pole, it was revealed today, after coming down with altitude sickness and being forced to rest for 36 hours.
He was left weakened, dehydrated and in pain by altitude sickness and exhaustion.
Dramatic scenes of him groaning and suffering will be screened on Sunday in British TV channel ITV's second episode of his documentary about the challenge, Harry's South Pole Heroes.
The Prince can be heard groaning loudly as he is being checked by a medic, and he admits, "Antarctica jumped up and bit me on the ass."
The health scare began during the eighth day. After suffering a nagging headache , he tells a medic: "It feels as though it's expanding. It's getting worse and worse."
He is seen being tested to check he still has feeling in his limbs and asked about whether he has vomited as a result of his condition.
Harry explains later: "If you show a weakness to Antarctica, I think it exploits it. And I think it will slowly grind you down until you have the utmost respect for it, which I now have.
"I thought I could come out here and just crack on and see it through without any issues, make sure I'm here for the guys when they need me."
Dreadful weather conditions eventually led to the competitive race element of the challenge being abandoned, with the teams eventually arriving at the South Pole together.
Relieved Harry said of his team at the finish: "I'm so happy for them. They've done so well - every single person, but especially these guys and girls. I'm honoured and privileged to be here with these guys. It's been very special."