Heh. In Gokusen's defense, it's meant to be rather cracked out, and the boys are meant to be more of obnoxious hoodlums than they are in the live action, hence the yelling. It was also one of his first really big roles(he did kindaichi before it, which was good, but I don't think it was a big role for him...it was straightforward story and mystery, not a vehicle.)