Because when your mother says give me the DS in a stern voice, you probably shouldn't toss it down the stairs at her. I could see it in his face as he made the decision to do it, and I also saw the instant regret the moment it slipped out of his hands as he tried to take it back mid-air. The slow motion fall of that little red box will hopefully live in his mind for a long, long time.
Too bad Nicholas. Gravity will get you every time.