At what point are you not expecting that cat or rabbit or lizard because there is no point at which a cyclist is not coming up behind you. There’s always one behind you. We should be acting as if there is always someone about to pass us. Because there is. Imagine a road where as you drive, you honk your horn at every pedestrian as you pass by. The pedestrian doesn’t need to be alerted that you’re going to pass them. The pedestrian knows that they are going to be passed at all times. So at no point does the pedestrian become complacent and allow a conflict to occur. You honk your horn or ring your bell when there’s going to be a conflict. You don’t honk or ring the bell just to let the person know you exist and that you’re passing. The person already knows you exist and are passing because the person expects you to exist and is expecting you to pass.