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.

A heavy equipment load and a malfunctioning BC add up to extreme danger for one unsuspecting diver.

John nearly becomes the second victim when he attempts to rescue a struggling diver.

Lessons For Life: Eager to dive before her training was complete, Abby found herself in a life-threatening situation she wasn't prepared to handle. Learn from her mistakes and avoid this tragedy.

Sandra never really wanted to dive, but under pressure from her boyfriend she gave it a shot--with nearly fatal consequences.