Tell me about a time you experienced failure? What did you do to overcome it?

"When I was a researcher after college, I was having a rough time transitioning to being an independent adult. I felt very overwhelmed, and that translated into my work. I was the lab coordinator and was responsible for maintaining all of the other researchers' lab standards. One day I was rushing through all of my duties to leave the lab on time and accidentally compromised a biological sample we had been developing for eight weeks. I was utterly devastated when this occurred. I felt like this was proof I was a failure, and that wasn't cut out for anything. When I approached my boss, she was, of course, disappointed in my mistake. However, she was also disappointed that I had not communicated any of my issues with her or other friends in my life. I learned that it is okay to ask for help and that no one does it all alone."