It’s Mean, It’s Green, It’s the Mystery Machine

With a reunion on the way for “The Mystery Kids,” an old child band and previous owners of the Mystery Machine, the van begins to have a mind of its own. It is seen driving on its own and starts to glow an eerie green color. Is it the ghost of the old keyboard player, Flash Flannigan, or the Mystery Kids, Andy and Mandy, pulling a prank?