Have you ever had to cancel your well laid plans at the last minute?

Have you ever put a massive effort into planning a special moment, activity or event and at the last minute something comes up that you have to pull the plug? How did you handle that change of course and how did the people/people involved react? Were they supportive or reacted like crazed banshees when you broke the news?? Were you the planner or the one left out in the cold and what did you do?