Any unconventional breathing pattern will make you dizzy, light headed, feeling bad, choose a condition. Rapid shallow breathing, rapid deep breathing, slow shallow breathing, skip breathing, not breathing, ... All bad. No need to be submerged, either. There are just two ways to breathe to keep your head clear: 1) normal breathing, 2) deep breathing at normal relaxed rate
Your breathing probably affected your condition. The excitement and awe may also have distracted you. Or the hypnotic bright spot of you dive light in the dark void.
Nitrogen starts to have a minimal effect around 20m and it can be noticed by most at 30m. Nitrogen probably affected you a little, but these two other issues may have been more important.
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Narcosis... How do we define it? Do we define it as the slowing (etc) effect of nitrogen/inert gas on the nervous system; or do we define it as the reduction of divers functionality caused by nitrogen(etc), fear, tiredness, exhaustion, hypotermia, worries, hunger, excitement, immersion effect, gloves, need to pee? Do not always blame the nitrogen, when the fault might actually be yours
