The toursists need to be entertained. You could say we do this to ensure the economic viability of San Francisco as a tourist destination. Anyway, life's too short to be taken seriously. And pity the bus or cable car unlucky enough to roll by this pack of feral city dwellers. Then they realize how much fun it is to be a dog.
Nothing is sacred to a dog.
At about the third stop, people begin to take on the persona of a dog. Running in streets and over sidewalks, the Urban Iditarod soon shows that man's best friend can be traffic's worst nightmare. It was pure mayhem. The guy in charge was drunk and hanging onto a lightpost shouting directions. I've never seen anything like this.