How? 128 is injured because he lost control of his bike and rode out into traffic. If the driver had stayed he would still be just as injured and his bike just as wrecked. Why does it matter if it was car vs bike or car vs car or bike vs bike. The driver hit someone and he should have stayed but the fact that he didn't did not in any way worsen 128s condition since there were thankfully other people there to get help for him.