You are sitting in a vehicle and always looking toward the front , of things coming your way, or you anticipate them coming your way. Never looking at the things passing you by.
Those things which you are anticipating to come, approach slowly at first, then rush towards you and pass you by in a blip, but by the time they approach you, you have already lost interest in them and your focus of attention has shifted towards the next upcoming thing. This is the basic difference between a child and a grown up travelling in a vehicle. While the child is mostly enamoured by his immediate surroundings, the thing passing him by in the present moment, adults are not. And even for this they are not to be blamed, they have already lost their keen senses of perceptions, needed to live in the here and now, long back, and even if they try to focus on their present surroundings, they won’t be successful due to their short attention spans.