I had a conference in San Francisco last year. One day as I was walking between Moscone Center and the hotel, a roughly dressed woman was walking on the sidewa

I had a conference in San Francisco last year. One day as I was walking between Moscone Center and the hotel, a roughly dressed woman was walking on the sidewalk alongside of me. "Watch out for that shi*!" she exclaimed. I thought she was crazy, shouting at random. Then I saw that I'd stepped in human poop. True story.