Great read and I've passed it on, it may come in useful for me or someone I know some day. Just want to ask a few questions: 1-What triggers this response? Are you just swimming casually when all of a sudden this kicks in? 2-For those who have experienced drowning, what stopped you from swimming normally? I've always been a good swimmer and hardly ever had problems in the water. There was one year when I was 9 in a wave pool in Rhodes, there were no more Rubber Rings so I swam in, I was out of my depth and I got hit by a wave I miss timed, and couldn't correct my timing so I started to panic realising I was about to drown, luckily a woman close by saw this and pulled me up...drowning scares the hell out of me.