I've got a weird one. I got a dvd for a birthday one year. Tenacious D Complete Master Works, it was called. It was meant to contain their HBO show, a live concert, a couple of music videos and some extra stuff. However, the 2nd disc of the 2 disc set was somehow - somehow - a Bruce Springsteen concert instead. The graphic on the surface of the disc said Tenacious D, but it had somehow accidentally been coded with something else. To this day I don't know if that happened to a million copies of the thing or mine alone.