I've noticed that whenever I'm learning a new language, the point at which I feel that I've gained "conversational" proficiency coincides with the point that I start dreaming in that language.

Tonight, I found that this applies to morse code as well.

I was sitting on some kind of cablecar, when I heard some faint, hissing noises on the speaker system. I recognized it as morse code, but all I could make out, was some series of CQs, followed by "L".

At another point I was at the same morse course that I've been attending for the past few months. A fellow participant started sending "-.-.--" on the hand pump, a code which apparently doesn't exist in the morse alphabet.

Update: I have later found out that "-.-.--" is the morse code of "!", the exclamation mark.