Depending upon where you worked and your experience, you may have already encountered the worst of the worst! In an emergency setting or even in your every day pediatrician's office, you might have encountered a difficult personality or a scenario that caused a patient to resist treatment or give you an attitude. Draw from your experience and give an example of someone who was extra challenging for you. How did you handle it? What tools did you use to stay calm while interacting with a difficult personality? Show you are competent in handling those tough patients by explaining your reaction and how you helped through the situation.