Soon after they enter the Taft Hotel, Elaine Robinson (Katherine Ross) is at first puzzled and then vaguely alarmed that so many staffers are (a) effusively greeting Benjamin Braddock (Dustin Hoffman) and yet (b) addressing him as “Mr. Gladstone.”
After a midget bellboy adds his own Gladstone greeting (“And how are you this evening?”) Elaine’s alarm slightly intensifies, and yet she expresses this by removing her left hand from her coat pocket and touching Ben’s right elbow.
The chaotic wedding finale aside, Elaine’s gesture represent the gentlest, most emotionally sincere and curiously touching moment in the entire film. It happens at the :15 mark.
