In a car your always in a compartment, and because your used to it you dont realize that through that car window everything you see is just more tv. your a passive observer and its all moving by you boringly in a frame.

On a bike the frame is gone your completely in contact with it all. your in the scene, not just watching it anymore and the sense of presence is overwhelming. the concrete whizzing by five inches below your foot is the real thing, the same stuff you walk on, its right there so blurred you cant see it yet you can put your foot down and touch it anytime, and the whole thing, the whole experance is never removed from immediate consciousness.