As a scuba instructor, and Caver, I see "panic" often that manifests itself from ones own inner anxiety and "fear".
it's all in your head.
if you can control yourself and breathe deep, the solution is out there.
So for us adrenaline junkies, lets combine both.........scuba in an overhead environment caving deep into the cavern system floating along neutrally buoyant through that world.
all while deep in the mayan jungle. To the underwater cenote cave system called Dreams Gate. An Advanced dive for sure!
https://vimeo.com/114802443