Norton Moped???

While I was out riding in the neighborhood today I passed a guy going the other way on what looked like a little Norton Moped. He must have converted a vintage moped or maybe a bicycle. It was all black, had a top tube frame like a bicycle and narrow tires like a small bicycle. He sat on a small pillion seat and it had a headlight and a peanut gas tank with the old Norton logo in gold on it. It was really neat looking, like a tiny motorcycle. I wish I could have taken a picture of it.