A designer I’ve been working with on a book project reported today that he saw a guy in downtown San Francisco walking a dog. Okay, no big deal. Except on the dog’s back was a cat. But it doesn’t stop there — on the back of the cat was a rat.

Even though I’ve lived in the city for a long time I still had to say “Come on, do you expect me to believe that?” But even then I knew it was true. And here’s the confirmation.