Not making light of the situation, but there is no way someone next to a wall got dragged down quickly without realizing it, not unless they are blind. 80% of a wall dive, you are looking towards the wall, and certainly would turn that direction if disoriented. Secondly, I am not afraid of going down fast. I am afraid of going up fast. If I am dragged down fast and end up in deco, my dive master will get mad at me, and rightly so. But that is the biggest risk. Exit current, ascend a meter every 2 seconds, maybe you save your dive, maybe you end it, but your life should not be at risk.
Something bad happened here, and it might be someone's fault or no one's at all. But the stories don't make any sense.
as others have mentioned, there could be multiple reasons why a rapid descent turned out badly.
your comment sounds like you are quite confident that your reaction to that situation would be calm and delibrate. thats great to hear. we all hope we will react that way.
but many long time divers are lucky to either never have been in any real "emergency" situation or ever felt the affects of a real panic attack and what it can do to your mind during a bad epsisode. again, if that is your case then thats great.
but no everyone is so lucky. i have felt it. it is not pleasant to say the least. it can be so strong that your body will not even breathe. no rational thought is taking place. people can even rip off ther own mask and/or pull their own reg out of their mouth.
if caught off guard into a rapid descent, many divers might panic. a full blown panic attack will simply not allow common sense or the training instinct to prevail.
- they might dump air from the bcd rather than inflate it
- if they do try to fill the bcd it may contribute to a rapid loss of breathing gas
- they might begin kicking so hard that they quickly deplete their already low gas supply
- they may be descending so quickly that the bcd inflate cannot put enough gas in the bladder fast enough to compensate for the added compression (there were some videos on youtube demonstrating this theory)
- if they are over weighted (i know that could never happen right?) every possible problem becomes exponentially worse
- as mentioned by others they may get narced and do who knows what
- (something i don't think has been mentioned) if they were on nitrox they may go much too deep and O2 toxicity kicks in. possible convulsions. reg comes out of the mouth. fill in the rest
it could be a combination of two or more of any of these possibilties or more that are not mentioned.
we were not there. we do not know what happened. we will likely never know for certain. this diver was not the first to go missing. sadly, they won't be the last. that is the reality.