Yeah Walter what is this "panic cycle" of which you speak?
I know what panic is and have felt it, but as far as it coming in cycles, I don't follow ya.
I freaked pretty bad once when I was a kid. After a three minute freedive on the bottom of a small lake trying to stab a carp, I rose up to discover I was somewhere underneath the boat dock and couldn't find the edge, and I was already way out of air.
Took me a while to convince myself to go back down and find my mask which got knocked off during my struggle.
And I too agree with most of Walter's requirements too. I'm also a serious proponant of being an accomplished freediver, THEN move on to scuba, just to be able to go deeper longer. It just makes the course so much easier. When I recertified back in 1991, I was shocked that my class had people that didn't know how to clear their mask, or their ears, or tread water, or swim any length of time. The reason I was shocked was because in my mind, scuba was always for people that spent every chance they got swimming in the water when they were growing up. People who feel totally at ease in the H2o. The kind of kids with the blue lips and wrinkled fingers saying, "Aw mom, d-d-d-do I have t-t-to g-g-get out n-n-now?"