I know of cases where a kid is hurt playing and the parents are forced to defend themselves from child abuse charges when they get to the hospital. I was constantly getting banged up when I was a kid.
I agree accidents happen .. I've had 3 children of my own who have scared the daylights out of me at times
but they waited six days before having him checked out?
I remember when my oldest was 3, he was bouncing on my bed, fell off, and cut open his head. In a way I was worried the doctor would think I had hurt him or something. The doctor turned out to be a nice guy who told my son, "This will scar and someday they'll say you're ruggedly handsome. But, right now you're a bloody mess." By the time my son got back to the waiting room he was trying to jump up and down on chairs, yelling, "Happy! Happy! Happy!"