Did I raise him to be too strong?

This afternoon, Keagan and Andrew were out front playing. Andrew came in after a few minutes to tell me somthing, then started going back outside. When Keagan saw him at the door, he said "Look Daddy owie". Andrew was talking to him about it and tried to bring him inside so that I could see. He got so mad that he had to come inside. He had fallen and scraped his knee on the cement. The crazy thing is, that he didn't even care that he scraped is knee. All he cared about was that he was able to keep playing outside. Andrew had to carry him inside, and as soon as he let him down, he ran right outside.