I read about a study that said the best thing to do after a trauma is to play a game like Tetris. The focus of the mind helps block the trauma from settling in. I think things like ping pong and even redundant video games help like you say. In college I had a sega genesis and would play NHL 94, Madden, and Sonic between study breaks. Well… between the time I should have been studying. Gives you time to reset and think.