When I walked out of my building yesterday morning, there were some children playing just at the doorway. They froze in mid-roughhouse when they saw me, and one girl said, in a very loud stage whisper, "우우우우… 외국인!" ("oooooo… oegugin!" "oooh… a foreigner!").
I think the main reason I derived such an immense amount of pleasure from hearing this was due to the simple fact that I'd understood it.