Arctic Free Diving Helped Save Her Leg. Now She Has a World Record.

After a biking accident, Finnish free diver Johanna Nordblad nearly lost her leg to necrosis. As part of her treatment, she began free diving under the freezing Arctic ice. The pain was agony when she first started; now she holds a world record for the sport she grew to love. British director Ian Derry joined her on a dive in this short documentary for an experience he describes as "literally breathtaking."

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