America's Next Top Pedestrian.I've long been fascinated by the rules that govern the sidewalks of Manhattan. One of my favorite occurrences while strolling through the city is the old speed-up/slow-down game that begins when you suddenly realize that you are walking right on pace with the person next to you. You both realize that you're walking right next a complete stranger, your steps in eerie unison. Usually, you both speed up at the same time, thus maintaining your side-by-side gait. Then you both slow down, keeping time with each other of course. And so forth. It's amazing the crazy dance we do just to protect a feeling of independence from the other pavement pounders who crowd the space around us.