First Blood is a 1982 American action adventure movie, directed by Ted Kotcheff, co-written by and starring Sylvester Stallone as John Rambo, a troubled and misunderstood veteran. Brian Dennehy and Richard Crenna appeared in supporting roles. It was released on October 22, 1982. Based on David Morrell's 1972 novel of the same name, it was the first of the Rambo series. Wikipedia
Rambo: I could have killed 'em all, I could kill you. In town you're the law, out here it's me. Don't push it. Don't push it or I'll give you a war you won't believe. Let it go. Let it go.