Crossing a pedestrian crossing is an emotionally arduous task, a trial of the ego and a frankly embarrassingly soul-baring undertaking. There are about a million ways of approaching, executing and completing it, but most of these are wrought with worry, awkwardness and a begrudging sense of obligation - the last on the part of the driver, the crossee, of course.
The whole traffic-slowing process entails a number of nagging questions on the crosser's part: Where does one put one's hands? Does one wave or smile at the crossee? How fast must one go? Must one look busy or arrogant, greedy or confident? Does one strut, bounce, galumph, float or glide along the zebra-walk? In any case, one is being watched - the scrutiny is intense, and the crossee only lets one cross because he/she legally has to, a great deal of the time. Hell, it's not as if he/she wants to.
It's not always easy for the crossee either. Sometimes he/she must slam on the brakes and look a goon for stopping so suddenly; he/she is often troubled by whether to stop when the crosser half-starts crossing on the other side of the road; also, will the crossee get rear-ended by the following vehicle not following the two-second rule when he/she legally obliges, engages and indulges the crosser? What will the police think if the crossee accidentally overlooks the crosser and slips on through unhalted because of the blinding sunlight?
However, despite that, the bulk of our sympathy must lie with the poor old crosser. His/her role is akin to trying to take a catch in cricket: the whole world is watching, the pressure is on, and one's whole sense of privacy vanishes into the stratosphere. The worst-case scenario is falling over, or dropping one's luggage on the crossing, as the traffic is slowed further and the embarrassment grows larger.
Then the old inferiority complex swells up; the natural assumption being the driver is more important than the walker so the walker must do his dirty business and make himself scarce without grace, ego or happiness as, low and behold, the crossee/driver is in a damn great hurry.