Rethinking, the Aspects of Play

After reading "Ravens at Play" by Deborah Rose, Stuart Cooke, and Thom Dooren I was a little unclear about problematic play. When I think of problematic play, I think back to my childhood when my brothers and I would playfight and they  would turn serious. Not becuase it had to be or anything had gone wrong, but because i just wanted to be seen as strong. This is what I had been expecting in the story, for the game, to stop being a game, and animal insticts to take over. But then again animals, as well as humans only pick fights that they "think" they can win. The ravens taunting the doors who were inside the car, was a cruel game, because had the dogs been outside of the car, maybe the ravens wouldn't have won their game.