[M]y doctor... told me, "A breathing class could help." ...strengthen my failing lungs, calm my frazzled mind, maybe give me perspective. - James Nestor

I watch several more competitors... Many can't make it... They resurface with blood running... from their noses, unconscious, or in cardiac arrest. ...And somehow, this sport is legal.

The sperm whale's brain is about 6 times the size of ours... They've had it for 15 million year longer... We've had our current size brain around 200,000 years.

[T]his is all happening in the nose. In slowing down that air all of these other functions allow us to gain 20% more oxygen breathing through the nose than... through the mouth.