The first time I saw someone paddleboarding, I was glancing out my window at Tomales Bay and I thought it was someone standing up in a kayak. My reaction was, “Sit down, you fool! What are you, George Washington? You’re in a boat! Sit down!” Then I saw that no, it wasn’t a boat: it was just a little board, which made it seem even more stupid. After that, I continued to make fun of…