Stig Severinsen can hold his breath for 22 minutes. He’s the world record holder but he’s not done yet. Now, Stig is using his unique powers to free dive in the most hostile of places. On 60 Minutes, watch as Stig swims the length of three Olympic swimming pools, under metre thick ice, in freezing water, on one breath, with only one way out. It’s an extraordinary feat. But still he’s not done. Stig wants to remove his wetsuit and try it again in nothing but a pair of speedos. What happens next, could kill him.