Rambo - First Blood (1982)

Wandering into a small, hostile town, ex-Green Beret John Rambo (Sylvester Stallone) is targeted for persecution and abuse by potbellied Sheriff Will Teasle (Brian Dennehy). When he can stand no more, Rambo goes bonkers, killing a deputy and heading into the surrounding hills, armed to the teeth. Only after Rambo has picked off practically every law enforcement officer within a radius of 50 miles do the local authorities bring in his former commanding officer, Trautman (Richard Crenna), for advice. Trautman's response - that the locals had better get a lot of body bags ready - is hardly encouraging...