Unless you're British or have seen Creeped Out on Netflix (I'm the latter) I don't know if you'll get this

SAY THE LINE, BART! THE CURIOUS. THEY SAY HE COLLECTS STRANGE TALES. AND IF YOU EVER HEAR HIS WHISTLE, YOU KNOW SOMETHING CREEPY IS ABOUT TO UNFOLD. NO ONE KNOWS WHERE HE'S FROM OR WHERE HE'S GOING TO.