When Tyler follows The Model into the subway car, she sits in front of a window and he sits next to her in front of a panel showing train info posted, but after she makes a face at him, his reaction shot is also in front of a window, then he's back in front of the panel again, till she gets up and, presumably with matrix moves, flits from one side of the car to the other, mid conversation, in a succession of shots, back and forth, till she leaves the car. Meanwhile, a man in a hat, reading a newspaper, sitting next to them, disappears and returns at will.