What you need to know about the most common cause of diving deaths.

An experienced instructor pays the price for making a rookie mistake.

Jesse's wayward ascent ends abruptly when he collides headfirst with the bottom of the dive boat.

Bill pushed the flying-after-diving rules just enough to wind up in a recompression chamber.

Ill-fitting, homemade gear and a lack of training add up to a near fatality on an ill-advised wreck penetration.

Trapped in the surf zone and unable to fight the waves, Mike thought his dive couldn't get any worse. He was wrong.

Overconfidence kills. But sometimes, when you're lucky, it just leaves you unconscious and bleeding.