21 Awkward Movie Mistakes Of All Time

The child covering his ears in 'North by Northwest'

In North by Northwest, there's a scene where Eva Marie Saint's character unexpectedly fires a gun at Cary Grant's character. One of the children playing an extra in the background covers his ears a few seconds before the shot is fired. You can see the moment at 1:40 in this clip. Couldn't somebody have grabbed earplugs for the kid?