Like many of us I thought that following all the instructions, procedures, stops, use of nitrox, ascent rate, etc… was sufficient protection against decompression sickness.
I just realized to my expense that this was not the case:
I was cruising the Maldives on a live-aboard at the rate of two and more often three pongs a day that I was doing at Nitrox 32%. Dive times between 45 minutes and one hour following the current (12l bottles), slow ascent speeds (1m / min at the last one !!)
I nevertheless had a decompression accident one and a quarter after getting out of the water, without having made any particular effort and without feeling the slightest fatigue. Symptom: dizziness and loss of balance, vomiting. Fortunately I was immediately put on oxygen, the boat rushed towards the nearest hyperbaric center (luckily only 1:30 by boat from the last dive site). I entered the chamber 3 hours after the symptoms and had six sessions over 5 days (15 hours in all). I have recovered to 99% and continue rehabilitation treatment upon my return.
I think that apart from my age (69 years) the number of dives (30 in 12 days), the cause is to be found in the fact that I did not drink enough on the last day. The center which treated me imposes 1 liter per dive (half before half after). I always saw that the drink was recommended, it is in fact imperative!
Fortunately I was well insured for the cost of these treatments.
This is an experiment that ends well in principle but is sobering.