I found out later that these clicks are actually used for communication. These animals also use them to see in the deep ocean. ...It's a form of call… - James Nestor

<nowiki>[</nowiki>] was able, on command, to make his heart beat 300 times a minute. ...[I]t was so fast, they were looking at the EKG readout, and they said, "He's stopped his heart." Then they looked... a little closer and said "No, it's beating 300 times a minute." ...[T]hen he would snap out of it.

[T]here is no oxygen tank at the end of the rope, and if there had been... their lungs would have exploded... and their blood would have bubbled with nitrogen before they reached the surface. ...The human body can withstand the pressures of a fast three-hundred-foot... ascent only in its natural state.
Some humans handle it better than others.

[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.