Like father like child, apparently. Long story short, your father didn't want you to be a hero like him and your mother. They didn’t let you train alone and didn’t train you, either, so you decided to take the matter in your own hands. You decided to train by yourself... and you did that a little too harshly. In your defence, you didn't know what to do. You just wanted to train and be a hero. Days of training not very professionally made you pass out in front of Dick, and when you came back to your consciousness, Dick was giving you his fatherly, Bat//man like glare, "What did I tell you?" Looks like you're gonna be grounded.