You are summoned to the aid of a​ 45-year-old male who was hunting and fell from a tree stand. When you​ arrive, he is experiencing severe pain in his lower right thigh. On​ examination, you find that an area about three inches above his right knee has an open wound about one inch in diameter that is bleeding minimally. There are no exposed​ bones, but you palpate crepitus and see swelling that makes you suspect bone fracture. You would you classify this as​ a(n):__________