Everypony you meet makes an impression in your life, either good or bad. Sometimes the impression is very minor, but other times it lasts long after it's ended. Rainbow Dash knows this all too well, and has spent most of her life trying to forget about somepony who hurt her when she was young. But as she's about to learn, you can't run from your past forever, and sometimes even the bad experiences may help change you for the better.
A look into what made Rainbow Dash the mare she is today, and an indirect sequel to That Warm Feeling. (Though, you don't have to have read it first to read this one.)
Picture by UP1TER