That is a DX Valkyrie. And that night after we were done a couple of guys had to get to a softball game so they were high tailing it out there as they were already late. They might drive a civic, I can't remember. My guess this is probably who you thought "stole" your disc". I would guess that the disc that Joe has is the disc you are looking for. For future reference, you might have your friend mark it with his name and number. They often will make it home.