What’s more, he was relatively late to the sport, having served in the British Army with the Gurkhas, before a stint in the Special Boat Service, the elite unit of the Royal Navy; only eight years ago, just shy of his 30th birthday, did he turn his attention to feats on the roof of the world. And to top it all off, he has demonstrated a remarkable ability to burn the candle at both ends, combining late nights with lofty mountains. In one scene from his Netflix documentary, he is shown dancing and downing whisky in the moonlight before taking on an 8,000-metre peak. No wonder he’s become an overnight celebrity. 

Despite this new-found fame, Nimsdai continues to guide a small number of trips through his adventure travel company Elite Exped, which promotes his favoured brand of rapid climbing. I joined an intrepid group of 13 for a crack at Aconcagua, among the more accessible of the Seven Summits (the collective term for the highest peaks on each continent) – but still a colossus at nearly 7,000 metres. 

The youngest in our group was Juan Diego, a bright-eyed 19-year-old student from Mexico, while the eldest was Luke Hepworth, a globetrotting philanthropist from Sydney. With the most high-altitude experience of any of the group, having stood on the 7,056-metre North Col of Everest, I felt confident I would make it.