William Trubridge is the world’s best freediver. Freediving is the act of diving without the use of a snorkel, scuba gear, or any other breathing apparatus. Basically, you’re just going down there and holding your breath for as long as you can.

Trubridge has dived to a depth of 100 meters — approximately 330 feet — without assistance. And he didn’t die. This short journalistic piece on Trubridge documents his life before freediving (of course he was basically raised in the ocean), his efforts in the sport, and his philosophy on it.

Probably most interesting is his statement that freediving is as much mental as it is physical. I for one can’t imagine diving that deep, or for that long a period of time, without feeling the sense of deep, instinctive panic you get when you go underwater for too long. Trubridge’s approach seems more zen and meditative than athletic — though obviously he’s in incredible shape. To overcome the body’s most basic need — the need for oxygen — sheerly through the force of your mind is what’s most incredible about Trubridge’s accomplishments.