Trivia: Not a mistake, just a fact. Exactly 2,357 pies were used in the big pie fight.
Trivia: In the beginning of the movie there is a reference to a Frenchman who had crossed the Channel by plane in the previous year (1909). The man meant is Louis Blériot, who flew from Calais to Dover in his famous craft 'Blériot XI' in 37 minutes. Again it was a competition race, for a 1000 Pounds set by the London Daily Mail.
Trivia: The plane which is shown flying at the end of the movie was actually built and flown for the movie. The stunt pilot Paul Mantz was killed while flying it for the movie, which is why the plane is not shown landing in the movie's final scene.