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.'"