Anyway, just as yesterday, since you know everything about Hitch's masterpiece already (there are far better articles about it than the one I could provide here), I won't offer you a boring review, but a funny goof.
Please note the small boy in the scene's background:
The simple story goes like the scene required many reshooting, so the boy might have been scared/fedup with the coming gunshot's loudness. But don't blame the director: in 1959 nobody predicted the technical development of the future where crazy cinephiles have a chance to watch every details in slow motion (see the truck's explosion and Cary Grant's puppet under the vehicle:) Even more mostly minor goofs on NbNW are here).
10/10