What do you recommend doing if an employee signs a performance evaluation that he scored low and throws a fit?

One of my reports received his performance review and he did not take it well. He did not disagree with it , he signed the document and he immediately threw a fit since he is not going to get a raise. He got so upset he was sent home by the company doctor due to his blood pressure. I am not sure my immediate boss will support me. I know this guy met with my boss and my boss has not mentioned anything about it to me . Despite the fact that he deserved his score I can't help feeling uncomfortable and believe he is going to make a huge fuss about this. How do you deal with your own feelings in situations such as these?