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Well first off they went into the water...I cannot even begin to start to list them.
My guess would be that the text was autocorrected to "narcolepsy" from "narcosis".The text clearly states that he is getting nervous and narcolepsy is setting in!
I was thinking of you when I coded that in.P.S. Scubaboard apparently has this nifty feature that saves your reply when you accidentally close the window. Cool!