The woman's face, with her terrified eyes and screaming mouth, show a look of genuine horror. It is effective to begin with this image, as it evokes an emotion of terror that stays with you throughout the clip. Coupled with the dim lighting, frantic movement of everyone, and dramatic music, I'm on the edge of my seat the entire time! The image of the flashing MUR-DER also seems very Hitchcock-like. The mood of this clip, and likely the whole film, is definitely one of an anxious society.
I did not spot the Hitch cameo appearance, will have to keep looking.