Mrs. Cabinet: "Yes, I'm one of your patients, but I'm calling about my husband. He was putting cole slaw away after our Memorial Day barbecue, and he bumped his head on a cabinet."
Dr. Grumpy: "Did he get knocked out? Or is he sleepy? Or weak anywhere?"
Mrs. Cabinet: "No, but he has this big lumpy bruise on forehead. I want an MRI on him, immediately. We can do it tonight. Just tell me where to go."
Dr. Grumpy: "Well, I really can't order that on him. I mean, he's not my patient, and I can't set up tests after office hours. The best I can suggest is that you take him to an ER, and let them assess him, and see if they feel he needs further testing."
Mrs. Cabinet: "I don't want to take him to an ER. He only bumped his head. Going there would be overkill."