A great answer to this question would follow the STAR framework:
1. Situation: Describe the context where you had to change your course of action at the last minute.
2. Task: Explain the objective or goal you were originally working towards.
3. Action: Share the specific actions you took to recognize the need for changing your approach.
4. Result: Clearly outline the outcome of your decision to change course - was it successful, and how did it impact the situation positively?
5. Learning: Reflect on what you learned from this experience and how it has influenced your approach to handling similar situations in the future.
In your response, focus on illustrating your ability to adapt quickly to unexpected changes, communicating effectively with stakeholders, and problem-solving under pressure. Highlight your calm demeanor, ability to prioritize, and think on your feet. Emphasize any positive outcomes resulting from your decision to change course, and be sure to convey a sense of self-awareness and a willingness to learn from challenging situations.