I am shooting a short documentary type film soon, and I have two subjects in the frame, one is quite short, and the other quite tall. The short subject will start off in the shot, and then the tall one will enter later. However, I don't want to give the short one too much headroom for the start, so should I not give him much headroom, but then whenever the tall one enters, just tilt the camera up every time, and then when he leaves, should I just tilt it back down for the short one? Or will doing this enough times, draw attention to itself perhaps?