Seoul subway Line No. 2 was delayed over 20 minutes during morning rush hour due to a conductor taking an urgent toilet break on Monday, according to Seoul Metro. The conductor who was driving a train on the outer lane of the circular route had to leave the train urgently to use the toilet in a station at 8:11 a.m. While an engineer watched the train, the conductor ran down the platform and returned in 4 minutes 16 seconds after using the restroom on another floor. However, the 125 trains follow