 Mel Brooks (I) (qv) had problems with Yugoslavian extras who did  not speak English. Some extras playing museum guards were to walk  through the museum ringing a bell and shouting, "Closing time!  Closing time!" The extras misunderstood and walked through the scene  shouting "Cloakie Bye! Cloakie Bye!" Brooks decided "Cloakie Bye"  was funnier, so he left it in the movie.