Several people can be involved in an incident, each with his or her own interests and motivations, and somehow the reader is made aware of all the nuances of feeling.
Jane Austen puts together another explosive mix for the next scene. She has Edward arriving to visit Elinor (seeing her for the first time in several months) just when Lucy is present, boasting of the warmth with which she believes herself to have been received by Edward's mother.
However, my favourite example of a 'crowd scene' occurs at the shock occasioned by Sir Thomas's return from Antigua in Mansfield Park and his response to the proposed theatricals. We are so skilfully made aware of contrasting reactions of the numerous individuals affected.