If an old Korean woman asks you something in Korean, but you can't really understand them, do not under any circumstances just answer "ne". I found this out the hard way.
So a Korean women came up to me and asked me something in Korean which I couldn't understand. (I later found out she was asking if she could go ahead of me in line). I replied "ne" and proceeded just to stand there, in which in the following moments received the biggest verbal onslaught of my life. She threw around phrases like "jook uh leh" (and not the cute "my sassy girl" way, the pissed off im gonna cut your head off way) and "pyeong shin" and just mean stuff
Korean women are the scariest there are..