Wim Hof repeatedly, in every video of his I've seen, tells people to do the breathing in a safe place, not in a pool or in the car. He even has a safety first v

Wim Hof repeatedly, in every video of his I've seen, tells people to do the breathing in a safe place, not in a pool or in the car. He even has a safety first video that discusses these things linked in all of his other videos.