if you have a child who plays baseball, much like bob casey plays baseball, gets hit on the head with a baseball, every one of those kids now that hits an e.r. in the united states gets a ct. why do they get a ct? because the e.r. doctors are absolutely afraid even though they have a totally normal neurologic exam, even though they have good parents at home, even though they think they will follow signs of onset of coma or change in behavior, even though they know that, they get a ct. now, multiply the number of kids in this country that get hit on the head with a baseball every summer in this country and add to it $1500 of which less than 1% are indicated, you're coming up with hundreds of millions of dollars just for baseball in this country. whereas the prudent man would say parents, here are the things you have to watch in this child. there is absolutely no neurologic sign that your child has been significantly injured, but if any of these five things start happening, i want you to come back here immediately. that's not good enough anymore. in a court of law. why didn't you do the