This incident occurred during the filming of THE CHARGE OF THE LIGHT BRIGADE (1936).
Michael Curtiz, the director of the film (best known for CASABLANCA), was Hungarian-born and, shall we say, somewhat English-challenged. So, to set up a scene in which a number of riderless horses were supposed to stampede--symbolizing the number of soldiers lost in this famously lopsided battle--Curtiz gave the order to "bring on the empty horses." Errol Flynn and David Niven, the stars of the film, practically died laughing.
Enraged, Curtiz yelled at them, "You and your stinking English! You think I know fuck nothing! Well, let me tell you--I know fuck all!!!"