In what appears to be a Librarian-approved prank, some ghosts showed up at the New York Public Library, only to be thwarted by some Ghostbusters look-alikes.. All to the tune of a royalty-free-yet-familiar soundtrack.
What I found funniest happened at the 1:02 mark, when the lone man with the racially-profilable scruff and the yellow wiring coming out of his bag, reaches for his cell and mouths "W-T-F". It's hard to tell if the actual stunt took any longer than the runtime or the final clip, but the crowd reactions are priceless.