Air can be refreshing in many different ways. Air you breathe in after exiting a stifling subway station is one of the best feelings in the world. Air going into an air conditioned subway car after being on a hot steamy station is a wonderful thing. This is why it’s tragic to breathe in air conditioned air that’s mixed in with some ambiguous B.O. This happened to me when I got on the Q at Canal street going over the Manhattan bridge which meant I was trapped since I don’t like switching between subway cars while it’s moving.