Workshop format invented by Alberto Brandolini combining 'domain events' with 'brainstorming'. Business experts and developers stand shoulder-to-shoulder at an unlimited modeling surface (long paper on the wall) with markers and colored stickies, writing past-tense domain events on an orange-sticky timeline. Time-boxed (4–6 hours). Goes through divergence → emergence → convergence phases. Everyone can add in parallel so no idea is lost and no boss dominates. Events map directly to code in a CQRS/event-sourced system: commands issued by users trigger domain behavior (yellow stickies) which emit events. Heimeshoff considers it essential because it forces collaboration outside comfort zones. Reading participants' emotional reactions matters more than their words.