A couple look into the camera as the foreground is filled with balloons.
The couple is trying to figure out who the person across the street is who is holding the camera.
People cannot look into the camera while they are trying to figure out who is holding the camera.
The couple would know who is holding the camera if they were the ones looking into it.
If a couple look into the camera they are not trying to figure out who is the person across the street.