Recorded 16th December 2013 at Loughborough’s Conversation Analysis Day. The theme for that years meeting was “Conversational Structures and Sequences”. Trevor talks about one of the most common types of interactional sequences: someone says something, there’s some trouble, and there’s then an effort to fix it. He specifically looks at repair initiation — examining the prosodic design of these actions can change the nature of the action. In his presentation he demonstrates how pitch delimits the trouble source, that rising intonation is ambiguous between hearing and recognition problems, and how leaving something out of the prior talk can be productive for the ongoing talk.