My dad was driving me to middle school when I caught sight of an unusual object hovering over a tennis arena. It looked like a metal bowl turned upside down without a rim. At first, I thought it was part of the tennis court that I had never seen before until it shot backwards and disappeared into the fog. I think there was a black porthole on the bottom, but I don't know for sure since it disappeared so fast. I instantly told my dad, who asked me what I thought it was. I said I had no idea. I was impressed since I am an enormous UFO fan but I have only seen one before. It was the first UFO I have ever seen that moved, and it was unlike anything I had ever witnessed before. It moved in a perfectly straight and immensely fast path.