hahaha..... The first stupid thing I did in London! After I got off the subway, I walked up the stairs to get to the street. I walked, walked, walked, walked, and walked, ...... It is endless!! Guess how many steps are there at Russell square station? 175 steps!! It is higher than a 10-floor building. Then the second day when I took the train again, I saw a sign on the entrance to the stair, "People are not expected to use the stair except in an emergency." How stupid I am!!