[cubanoperdido]

ay-yo,

what in the world is hookah??? i been divin since i was born an never heard the word....is that another word for snuba? diving with a long hose pumping compressed air down? holding your breath at any given deapth is no problem, even if you were to go down, your lungs would compensate for the compressing of the air inside them. as was mentioned, and is a real hazzard, is in ascending while holding your breath..air expands and cant escape cause you're holding it in and...yes...pop....lung overexpansion injury--tears your lungs apart, can also cause embolism (pushes small bubbles of air into cappilaries of blood yu got in yur lungs--get to your brain and "game over, please deposit another 25 cents"). as mentioned, you should never hold your breath cause you might be ascending and not realize it, and also yu can become used to doing it and do it unconsciously while ascending. this have nothing to do with nitrogen, nor oxygen....simple fact that air expands while yu ascend and if yu hold your breath your lungs blow. saw it in st thomas, usvi, damn ugly..dude come up coughin and spittin blood...but lots of blood...went into shock and passed out, ambulance took him away--paramedic was talkin "embolism this, embolism that" which could be the case as well, but his lungs was torn apart for sure. if yu on the bottom and aint movin, its no problem....but like i said, its habit forming, specially if you used to freedivin...but maintaining the same depth or descending is ok...