It's much to do with your communication skills and presence of mind. Positive attitude, enthusiasm, confidence. You do not have to be a genius, but you have to be yourself, and be comfortable just being yourself. Humility, respect, integrity, and a sense of satisfaction and thankfulness to the people , goesa long way. Just be yourself, but show that you are ready to face what may come, ofcourse your life is in no danger, but it counts when it matters, to show courage.