100 people, climbing the 31 stories of Trellick Tower, and then abseil 322 feet down with the help of the British Army. A 322 foot drop done by 100 people is 32,200 feet. That's more than 2,000 feet higher than Mount Everest.
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Trellick Tower is a Brutalism building in London, a 31-storey block of flats in North Kensington, very close to Portobello Roaddesigned by architect Erno Goldfinger.