Reminds me of a time I was searching for parking in downtown Washington, DC. Block after block was full. I eventually came to a street that had no cars parked at all. Jackpot, right? Must be some obscure rule prohibiting parking there. I kept looking. Still no luck, so I finally went back to the empty street. I carefully studied the signs and concluded that it was legal to park there. I got out of my car and paid. By the time I was done paying, the entire block was full of parked cars!