Go for a big impact story! Sharing a unique story will not only make you stand out from the rest but give the interviewers something additional to remember you by. Be sure to not use names or too many personal details about the patient. Tell the story calmly and let the interviewer know that you handled the situation calmly and professionally.
"I have been told by my previous and current supervisor that I manage stress very well. Nursing can be a demanding position and I knew that before I committed to this career path. I stay calm by being an open communicator and keeping the end goal in mind."
Be sure to keep this answer positive and stay focused on the question. It is easy to get derailed and start talking about people or situations that irritate you. When answering this question keep calm and provide the facts.