Cosmic Freight Train is a song from the episode, The Dead Talk Back.
(everyone dressed like hippie rock musicians)
Mike: Can anyone tell me why we're dressed like this again?
Tom: Mike, remember, the name of the movie is The Dead Talk Back. We're The Dead, get it?
Crow: Come on Mike, really dude.
Mike: Okay, freak freely.
(they begin playing, singing)
Been ridin' on that cosmic freight train
And don't you come around here anymore.
(to Crow) Take it!
(Crow plays a very long, meandering guitar solo until movie sign)