The top mistakes in The 39 Steps http://www.moviemistakes.com/film4750 en Sat, 07 Nov 2009 06:55:28 +0000 90929 Hannay is talking to the milkman inside the door. Outside the door you can see across the street, the two guys walking down the sidewalk. A moment later, Hannay goes toward the door and now there's the milk wagon on the street right in front of the door. When Hannay pointed out the two guys across the street to the milkman, the milk wagon wasn't there and the milkman is inside with Hannay so he couldn't have pulled it up. 90930 The serial number of the autogyro has been reversed, showing that the stock shot has been reversed for effect.