As a non cave diver, i was wondering:
  1. How do you breathe when you get into a dicey situation such as silt-out and/or lost line?
  2. What breathing techniques are you taught and have you experienced a real-life situation where it worked?
  3. How do you stop the snowball effect of negative thoughts?
  4. Are you able to turn a knob-thingy on your bottles to induce more CO2, much like breathing into a paper-bag?
I presume the mind goes into over-drive when stressed in a cave and fuels a negative feedback loop of short breathes and hypoxia. I'm interested how you're able to stop this in a stressful situation.

I read a post where someone said you breathe from your stomach and breathe deep and exhale straight away...then you pause. I always thought you pause when you inhale; which method is correct?

Thanks in advance.