Here is a Filipino diver from the Badjao tribe who descends 20 meters (65 feet) to the sea floor for catching fish without any oxygen cylinder. It's at this level that the hearts slows down to 30 beats per minute while squeezing the lung to 1/3 of its initial volume. But this guy goes down the sea just like a regular land hunter, walks on the sea floors and catches fish with an iron rod. This superhuman can stay under the sea for over 5 mins without breathing. What an achievement. Watch him do it, but don't try it yourself till you learn the art!
