Walter Brennan in the 1950’s movie My Darling Clementine
“When ya pull a gun...kill a man!!”
Bill Thornbury in 1970s Phantasm:
“Now, remember: you don’t aim a gun at a man unless you intend to shoot him. And, you don’t shoot a man unless you intend to kill him. No warning shots. Hey, you listening to me? No warning shots. Warning shots are bull####. You shoot to kill, or you don’t shoot at all.”