This chapter illustrates the operation of the analytic model we have elaborated in Part II of the book. The case comes from a ‘fly-on-the-wall’ American TV show in which members of the general public were tested as to whether they would intervene and help others in the face of public abuse. The incident has a complex participation structure, and as such triggers a complex set of polite and impolite evaluations. The goal here is to help the reader to deploy the concepts of the book’s model, including beyond relatively simple dyadic interpersonal interactions. The case is analysed in detail and then further data is provided for readers to try carrying out an analysis themselves.