This is halfway into the movie, when Adam is remebering how he got into the room. About three times in the movie you see Adam take the picture of Dr. Gordon in the parking lot. After he takes the picture he goes directly home, and he walks into his apartment to go into the redroom to develop his pics. There is no time lapse between him going to the fridge and him going to the room. He puts his camera down and puts up a picture on a hook. Look to the pic on the left of the one he puts up. It's the picture he JUST took of Dr. Gordon. That picture shouldn't be up there yet, because it's still in his camera.