You and your friend were criminals. Unfortunately for you Batman had caught you and tied you, then left you to fight off the other criminals of the area but then a handsome man came to Batman's side and fought with him. "Who's that other one? The pretty boy in the leotard." You asked your friend. "That's Nightwing. He was the Bat's first sidekick. The first Robin." Your friend explained. You looked at him as he was doing some acrobatics to dodge the falling containers.