I've seen him!!!!
Our route to and from visiting the ILs takes us right through Baltimore and around DC. One Sunday, we were driving along and noticed this really awesome car. Then we noticed the Bat ears on the driver and, as we passed, the mask and upper part of the costume.
I can't wait to share this with Oogydad. It's nice to know there's something good behind it. And, boy, had we wondered.