Dan Aykroyd presumably plays a hitchhiker Albert Brooks picked up along the way, and they sing along with The Midnight Special as anyone on a road trip would do.
But of course, since the tape player belongs to Albert Brooks, it breaks down.
Musicless, the guys entertain themselves by playing 'Guess the TV theme tune'
This inevitably brings up the topic of The Twilight Zone's memorable theme song, and a discussion of favourite episodes. Even people who don't enjoy self referential humor will get caught up in this story. I won't spoil the rest of the opening, but suffice it to say, it's terrifically creepy. Kudos John Landis!