The question popped out to me for the first time when I pursued a deeper personal depth record in Moalboal, the Philippines. It had been uncomprehending that I could not broke my Personal Best (PB) while there was still enough air in my mouth, and my chest and stomach felt no stress. Also, as far as I knew, I feared nothing except for lacking confidence and deft skills in my Frenzel equalization technique. I had been questioned by a Chinese ADIA instructor I hired locally for tons of times: What happened to you under there? You must know what’s going on with you because you are the only one knows and the one can settle it, he said.
FiDive to Be Free 