Hes either been shot in the head or wounded with a hard object or whatever but he has needed pressure to be released so they have taken out a piece of his skull and attatched a tube to his brain to release the fluid.His skull would have been frozen and will be replaced a few months after his operation.My nephew had no skull for 1 year he just got it put back in so his head dont look like that anymore but it dont take away the fact that he is now a vege.At least that guy looks alive so hes lucky.