He's A What?

While working as a radiology technician in a hospital emergency room, I took x-rays of a trauma patient. I brought the films to our radiologist, who studied the multiple fractures of the femurs and pelvis. "What happened to this patient?" he asked in astonishment. "He fell out of a tree," I reported. The radiologist wanted to know what the patient was doing up a tree. "I'm not sure, but his paperwork states he works for Bob's Expert Tree Service." Gazing intently at the x-rays, the radiologist blinked and said, "Cross out 'Expert.'"