You cannot stop in the middle of the sidewalk, street, steps of the subway, platform of the subway, or actually anywhere in this city. Once you start moving do not stop. You will get run over or punched in the face. Thanks.
Every day I have this problem and it drives me crazy! Especially those people who take one step into the subway car and stand there in the door so everyone behind them has to push their way in. Be conscious of your surroundings. Other people exist!