The aftermath: The subway was CRAZY, I had never been in such a high-tech, clean, airport-looking subway. They have these moniters everywhere that show an animation on the bottom of where the particular subway train you are waiting for is, so you can stare at the train animation moving across the screen from station dot to station dot as it happens. Lots of the subway trains have electronic maps that blink showing the station you are in and the one you are heading towards. Announcements on the train are made in Korean, English, and sometimes Japanese. Most signs in the station have English as well as Korean and the lines are color-coded (e.g. the one closest to me is Line 2, the Green Line). It is extremely complicated as each line has a ton of stops and each station has tons of exits that lead up to various points on the street.
With all the stations being underground, it looks like a mini low-celinged shopping mall in there. There are cosmetics, shoes, clothes, pharmacies, coffee shops, convenience stores, etc. The turnstiles to enter the train part of the subway are such that you just place your T-card on top and rub it a little and it was beep and open for you. Very quick!
Subway = chi-ah-chul 지하철
Station = yuk 역
Subway station = chi-ah-chul yuk 지하철역
Japanese (nationality) = il-bun sahram 일본 사람 or il-bun-een 일본인
It's expensive = pi-ssa-yo 비싸요
It's cheap = ssa-yo 싸요
How much is it? = ol-ma-ye-yo? 얼마예요