Prince Harry joked about his crown jewels after he did a running jump into sub-zero water in the Arctic.
After he took the plunge in a bright orange immersion suit, the third-in-line to the throne commented on the effect the sub-zero temperature was having.
The 26-year-old is in the final few days of training before he joins a group of wounded servicemen for the first five days of their trek to the North Pole.
The prince leapt bottom-first into an open stretch of water in the Arctic Ocean ice in his fully waterproof suit.
Moments before, he led the Walking With The Wounded charity co-founder, Ed Parker, to the edge and pushed him in.
Asked what it was like in the minus 1C salt water, the royal said it was a "silly question", then joked it was "warm".
When he first took the plunge, Prince Harry said: "It went up my nose." He then said to Mr Parker: "It had to be done."
On Friday, the prince will fly out to the start point of the 200 mile trek through the frozen wasteland.
Later, Harry set up camp in a valley near Longyearbyen.
Reindeer scurried into the hills as he pulled his sled up to the patch of snow and ice which was to be his home for the night.