Background: Korea
Place: Subway
Inside a large interchange station, my friends and I entered the gate thus stepped on a huge automatic moving walkway. The walkway was so fast and wide like a ski slope where I moved quickly through the tunnels and lost my friends. Sometimes I met up my friends but unable to keep up with them on steep slopes then lost them again and again.
It all happened like skiing underground on a huge people mover escalator system all the times.....
http://flic.kr/p/bUAQQx