Defusing is an early, informal crisis intervention designed to provide immediate emotional support right after a traumatic event, help people normalize their reactions, and stabilize acute distress so they can function and decide what help they need next. The window of about eight hours after the event is used because reactions are most volatile and plentiful in that early period, and a brief, supportive conversation can make the biggest difference in preventing these reactions from solidifying into longer-term problems. Intervening within this timeframe helps staff and witnesses feel seen and supported, and it also makes it easier to spot individuals who may need additional help or follow-up resources. Waiting longer than this early window tends to reduce effectiveness because distress may intensify, sleep and coping resources become more disrupted, and logistical challenges grow, making a helpful but brief defusing session harder to conduct. Remember, defusing is a concise, targeted step to address immediate concerns and coping, not a full debriefing.