I've had euphoric narks at 39m (on air) at Porthkerris in crystal clear water, when I felt like the best diver in the world.
I've had unhappy, tunnel-vision, anxious narks in 30m on a wreck in Tenerife. Twice, on different days on the same wreck. Thankfully I was diving with the lovely Buoyant Babe on both occasions, and she was most attentive to my mild panic, ushering me to shallower depths where I came to my senses.
