I felt as though I'd been transported out of myself, literally exalted and utterly joyful, aware of my skin all the way to my fingertips and totally in the moment. It was the most exquisite and intense pleasure I've had diving, and it was composed in part of the utter clarity of the water, the incredible beauty of the surroundings, and the complete peace of the place. Reef diving is visually and kinesthetically busy -- Life and water in constant motion, demanding your attention in every direction. The caves are meditative and internal, and I felt as though time dilated and even my heartbeat was slowed. I had some of the same reaction to floating between the walls of two billion year old rock, deep in the Grand Canyon, but this was ever so much stronger. This was truly a drug, and I will do whatever I need to do for another dose of it.