Originally posted by leo-kun:
i encountered this frightening experience before when i was young and not knowing the depth of the pool..
I suppose you know the effects of nitrogen acting up when you scuba dive.
This is something which i think i would react and quickly rush to surface when i panic.
Extracted from a website.
When a diver completes a dive, he/she must be very careful when coming to the surface. If the diver surfaces too quickly, the nitrogen in his/her tissues may form bubbles. We can visualize these bubbles to be similar to those that occur when you first open a bottle of soda. When the lid is on the bottle and the pressure inside is high, there are no visible bubbles because the gas (carbon dioxide in this case) is fully dissolved. When you pop the top, the bubbles form because there is less pressure holding the dissolved gases into the solution. Like the bottle of soda, if a diver surfaces too quickly, nitrogen bubbles will form in his/her body.
Unlike the harmless bubbles that form in a bottle of soda, nitrogen bubbles in a scuba diver can kill. These bubbles can form in many places and in nearly all cases will cause considerable damage. For example, nitrogen bubbles that form in the brain may cause blindness, dizziness, paralysis, unconsciousness, and convulsions. Bubbles that form in the joints, bones, and muscles cause intense pain. Bubbles that form in the blood can block circulation, and kill tissue. Bubbles that form in the spinal cord can cause paralysis. When bubbles form in the body of a diver, we refer to this as the bends or decompression sickness .
http://www.frontiernet.net/~docbob/scuba.htm