Overcoming adversity shows that you not only are a hard worker, but you also know how to persevere. This quality is highly desired by a company inspired by athletes. When you give your example, be sure it is work-related and find a way to keep it relevant to the job you're applying for.
Always leave a good impression.
Internship, learning experience, new job, new responsibility, unfamiliar with the task....
Under Armour's mission is to improve athletic performance through their products. This goal has taken them far in their industry and it shows that they truly care about their customers. They care enough to research and design gear that will help their customers achieve more through using it! The interviewer wants to know that you really want to work for them. Through your enthusiasm and your research you can shine! Let them know how you were impressed with their mission and their latest innovations revealed in recent press releases. Do your homework and expect smiles all around.