In light of this being WWE related, I offer this for the situation - http://www.youtube.com/watch?v=O9W6YPih0SA&feature=related
Nonetheless, I have to wonder where the sister was and why was access to the roof of the building so simple. A child of that age should not be able to sneak out of their apartment and climb to the roof and should especially be made aware of the dangers involved in imitating wrestling moves. The game is rated for teenagers, which means the parents should have been extra cautious about their nine year old son to be certain he was aware of the danger.
This is the problem today, parents are lazy. When I was a child my mother actually sat down a few times and watched what I played and I played some violent video games (GTA at 13-14, Mortal Kombat at 5 although she was less aware of that.) There is no fault of the game or WWE here, just an absent minding child and poor parenting.