When an organization faces a Sev0, or its most severe incident, it's characterized by high pressure, uncertainty, and a chaotic environment where familiar processes often break down. The situation is further complicated by unfamiliarity with the incident process, external pressure from customers and regulators, and the need to adapt on-the-fly. To effectively handle such incidents, organizations should prioritize efficiency over rigidity, factor out smaller sub-incidents, communicate clearly and frequently, break the tension among team members, and debrief on both the problem and the response process to identify areas for improvement. By doing so, they can mitigate the overall impact and keep stress levels under control.