Describe a situation in which you had a positive influence on your team's work.
This is a fairly generic question that gives you the chance to showcase a professional accomplishment of a smaller scale. The interviewer wants to know how long it will take you to think of something. You should have a few examples of work successes ready to explain for questions like this.
Don't repeat an answer you've already given during the interview. If you need a moment, just say so, and think of something the interviewer hasn't already heard.
"I was in a long meeting with my team, and we had been trying to finish a grant proposal that was due by midnight. Everyone felt stressed because we only had a few hours left, so most people wanted to keep pushing through. They were going to order food to be delivered and just keep working. But I could see the fatigue had set in for many people, and we were not efficient at all. I was the most junior member of the team, so it was a little bit intimidating, but I took a chance and said I thought that a 30-minute break would do us more good than continuing to work. After some pushback, we agreed, and everyone went their separate ways -- for a walk, to grab a bite to eat, or just to sit in silence. When we reconvened, everyone was rejuvenated and positive, and we finished the proposal within an hour."