The document summarizes key concepts about crisis communication from Chapter 3 of the book "Crisis Intervention: The Criminal Justice Response to Chaos, Mayhem, and Disaster" by William Harmening. It discusses (1) the importance of communication in crisis intervention and containment/de-escalation, (2) Transactional Analysis as a model involving the Parent, Adult, and Child ego states, and typical communication patterns from each, and (3) specific communication patterns like parallel vs crossed transactions and hooking someone in crisis into a more rational discussion.