This book is about joint intelligence in action. It brings together scholarship in performance studies, cognitive science, sociology, literature, anthropology, psychology, architecture, philosophy and sport science to ask how tightly knit collaboration works. Contributors apply innovative methodologies to detailed case studies of martial arts, social interaction, freediving, site-specific artworks, Body Weather, human-AI music composition, Front-of-House at Shakespeares Globe, acrobatics and failing at handstands. In each investigation, performance and theory are mutually revealing, informative and captivating.