In this Dec. 1, 2013 photo, on a single breath of air, freediver Roberto Reyes begins his practice plunge to 65 feet deep off Aguadilla, Puerto Rico. Freediving fans say it's an adrenaline rush to ... more 
In this Dec. 1, 2013 photo, on a single breath of air, freediver Roberto Reyes begins his practice plunge to 65 feet deep off Aguadilla, Puerto Rico. Freediving fans say it's an adrenaline rush to plunge without an oxygen tank to staggering depths, using weights or relying on gravity alone, and see how long they can remain underwater before what can be the hardest part: coming back up. “It looks very simple, but it goes beyond that,” Reyes said. “If you do it once, it's addictive. It feels so good that your body is asking you to return to the ocean.” (AP Photo/Ricardo Arduengo) less 
1 / 4
Associated Press | Photo By Ricardo Arduengo
Mon, Dec 9, 2013 3:08 PM EST