Dad , hurry ! The train is coming . Aha , I am a superman .   Don't rush , behave yourself please ! Let the people get off first .   Oh , we should . There are so many people . What if the train got full before we could get in ?   But , if we all pushed our way in , nobody could get off , and nobody could get in either .   How many stops are there to the Aidan station ?   There are four more stops .   Oh , my God !   What's wrong ? You are like a little monkey , on pins and needles !   Because I need to use the restroom . Is there a restroom on the train ?   No , not on the train , but in the station .   Why not ? You told me that subway is a kind of train . If it had no restroom . what kind of train would that be ?   Well , that is a question . You want to offer a suggestion ?   Oh , yeah , but not today . I am busy with praying the subway may get there as fast as possible .   I guess you'll never forget today . 