Don't be too hasty. According to stand watie y'all have this stinky bellybutton thing going on down thar.
It's a simple matter of observation and deduction from that observation, non-seq. There were people on the subway who smelled like New York's sidewalks. Those sidewalks had a urine stench, therefore it's a reasonable conclusion that the people on the subway pissed all over themselves (quite possibly while aiming for the sidewalk as they apparently so often do) and failed to clean themselves up afterwards.