M.P., a 28-year-old man, was horseback riding with his partner when the horse he was riding stumbled, throwing him from the saddle. In order to break his fall, M.P. stretched out his right hand, injuring his wrist. M.P. remounted his horse and continued to ride; however, his wrist continued to hurt, with the greatest pain in the region of the triangular depression on the dorsum of the hand bounded by the tendons of the extensor pollicis longus and the extensor pollicis brevis when the thumb was fully extended. When the ride was finished, he went to the local emergency room to have his wrist examined. The emergency room was crowded that afternoon, and the staff was extremely busy. When the resident came in, he gave M.P. a quick examination, decided that the wrist was sprained, wrapped it in an ACE bandage, and gave M.P. a prescription for a pain-killer. M.P. left the emergency room and for a couple of weeks, everything seemed to be healing fine. After the medication ran out, however, he began to experience more pain and a loss of movement in the injured wrist. M.P. then went to see his own doctor, who ordered X-rays of the wrist. The radiologist who examined the X-rays determined that M.P. had suffered a fracture of one of the bones of the wrist. The fracture did not appear to be healing, so M.P. was referred to an orthopedic surgeon.