What we have to remind ourselves constantly is that scuba diving is artificial and goes against all natural human instincts. For instance, breathing underwater, that's about as unnatural as it can get. Next, breathing with water on your face with no mask, that goes against every instinct we have as humans (or any animal) to hold your breath because we are underwater and you can't breathe water. It takes some very specific and specialized repetitive training to break this natural barrier. Some people are naturally better at scuba skills than others, but I do believe that everybody has a maximum panic threshold that they can not go beyond. Show me the best DIR diver, the most seasoned old schooler around, the best caver or wreck diver and all of them will have a panic threshold. Perhaps maybe there are some extremely trained military divers maybe in the .001 percentile that are able to retain composure all the way to death, but I certainly don't know any such people personally.
In the case of this video I think the threshold of panic was very low, low enough that I think the girl was probably at an unacceptably low level and shouldn't have been diving in open water before some of the comfort and skill issues were resolved.
I wanted to comment on a few of the above posts while I'm at it. If she ran out of air, which is a possibility judging by the bird wing flapping with the arms, then monitoring air supply is one of the skills that is critical to remember.
Next, situational awareness is another critical skill. She obviously lost track of the rest of the crew as she was sinking away because her buoyancy was in an out of control descent, another critical skill to constantly monitor.
I'm still trying to figure out what she was so stressed about to cause such a freak out? The dive was over, they weren't very deep at all so I seriously doubt narcosis was a factor. I have a feeling she was one of those that had to lie to herself to believe she could do this and was on the edge the entire dive then finally just had enough after 45 mins or an hour and completely lost it.
I'm just not seeing anything but a very ill trained individual and a very poor candidate for scuba diving.
Not everybody can be a scuba diver, the industry needs to understand this!
Yes I'm blaming the agencies, they and their agents are the ones giving these people the pass.