I guess what I am trying to say is wouldn't you deal with all the stuff that has stacked up on you, and then do your gas switch.
That's logical... and correct. But the issue being described is applicable to a non-logical, task overloaded diver.
I'm sure many tech instructors will agree
- some of the most common advice we inevitably give is to slow things down and get back ahead of the curve.
Easier said than done. It's one major issue that most trainee technical divers suffer from on appropriately intensive tech courses.
Even when divers attempt to slow down and focus on the task in hand... that inevitably collapses situational awareness and can lead to a string of subsequent hazardous issues.
What's really required is a high degree of multi-tasking, all of which requirements individually demand significant skill and precision.
You can't afford to get fixated on a single task to the exclusion of everything else. But that's what inevitably happens when overloaded divers try to resolve their situation... and it only causes them further problems.
A flaw in performing any single requirement causes a cascade in stress and subsidiary problems. This can easily collapse a diver beyond their ability to cope effectively, or even remember and apply the most basic, but critical, protocols.
This sort of collapse is the
norm amongst trainee technical divers, undertaking appropriately intensive and high standard tech courses.
Its not fight-or-flight. Dealing with air deprivation and other such stress factors are easily remediated in training. It's much harder to rectify an incapacity to deal with task overload and skill deficiency.
I see this all the time... and most of my students are already extremely experienced (000's of dives) recreational divers, divemasters and instructors.
In some ways, the more experienced divers embarking on tech training have the biggest problems... as they put themselves under additional performance pressure because of a need to perform well... and the disappointment when they don't. I've known some very capable, intelligent and high-performing individuals whose completely flunked tech training initially.
Sadly, it's also far from rare amongst more experienced technical divers who attempt dives beyond their capacity.