Sounds like time to pass round the chill pills.
Soon after I first started with nitrox I did a 'braille dive' in low viz in ?Plymouth Harbour back in the UK. It can't have been much more than 100 feet, but I was starting to black out so I thumbed the dive. The dive shop owner de-briefed me and laughed a big belly laugh when I said I thought it was ox tox. "I was a Navy diver during the war: we had to dive all over this harbour on pure oxygen, and when we started to tox out we just ascended a little!" 100FSW on oxygen is a PO2 of 4!! Don't go trying that at home! The problem, incidentally, was a tight neck seal on my new dry suit [cringes]!
Some things sensitize you to ox tox: CO2 is one; coffee is another. I've heard of rare cases of ox tox at way less than 1.4B. Chances are, for most people, that 1.4 gives a massive margin for error. Sensitivity varies person to person and day to day: you just don't know till it bites you in the butt. If your PO2 is above 1.6 and you're not in deco, you need to bring it down, but it's not an emergency. Large doses of coffee, of course, increase DCI risks as well as ox tox, which is something I too would do well to remember before big dives.
The fact that the nausea went on for so long after surfacing makes it highly unlikely that the problem was ox tox.
Taking calculated risks is fine: being unaware of the risks you are taking is decidedly unwise. We've all done bone-headed things underwater: the important things is to admit to them, analyse the event and develop strategies to avoid making an *** of yourself like that again. Underwater, I like to play 'guess my depth and time' - EVERY time I look at my computer, every dive. Buoyancy should tell you how much your depth has changed since you last checked; the game ensures you always know depth and time: God knows, computers can fail, and some make a habit of it. And if you're not where you thought you were it's a big sign you have another problem.
Soon after I first started with nitrox I did a 'braille dive' in low viz in ?Plymouth Harbour back in the UK. It can't have been much more than 100 feet, but I was starting to black out so I thumbed the dive. The dive shop owner de-briefed me and laughed a big belly laugh when I said I thought it was ox tox. "I was a Navy diver during the war: we had to dive all over this harbour on pure oxygen, and when we started to tox out we just ascended a little!" 100FSW on oxygen is a PO2 of 4!! Don't go trying that at home! The problem, incidentally, was a tight neck seal on my new dry suit [cringes]!
Some things sensitize you to ox tox: CO2 is one; coffee is another. I've heard of rare cases of ox tox at way less than 1.4B. Chances are, for most people, that 1.4 gives a massive margin for error. Sensitivity varies person to person and day to day: you just don't know till it bites you in the butt. If your PO2 is above 1.6 and you're not in deco, you need to bring it down, but it's not an emergency. Large doses of coffee, of course, increase DCI risks as well as ox tox, which is something I too would do well to remember before big dives.
The fact that the nausea went on for so long after surfacing makes it highly unlikely that the problem was ox tox.
Taking calculated risks is fine: being unaware of the risks you are taking is decidedly unwise. We've all done bone-headed things underwater: the important things is to admit to them, analyse the event and develop strategies to avoid making an *** of yourself like that again. Underwater, I like to play 'guess my depth and time' - EVERY time I look at my computer, every dive. Buoyancy should tell you how much your depth has changed since you last checked; the game ensures you always know depth and time: God knows, computers can fail, and some make a habit of it. And if you're not where you thought you were it's a big sign you have another problem.