Major New York subway etiquette breach. This is one of the escalators that takes you out of the Grand Central Subway Station. If you are not walking up the escalator steps, you stand on the right side. You could write a whole book on "unwritten" subway etiquette and volumes on all those New York unspoken rules that you just know after living here for years: the subway is the train, Greenwich Village is the West Village, Coffee Regular means with milk and sugar, you never wait for the walk sign, and every fourth drink should be a "buyback".