Give me an example of when you thought outside of the box. How did it help your employer?

"An example of when I thought outside of the box, one accomplishment I am particularly proud of, is managing a very large project on a very tight deadline while employed for (X company) as (X position title). To successfully do so despite the amount of work, I (... detailed information pertaining to this project, e.g., how you used your creativity to achieve your goals, what the ultimate outcome was and how satisfied your employer was)."