Southern Comfort (1981)

Factual error: In the boat-stealing scene, when the machine gunner fires a burst of blanks out of the M60 at the Cajuns, the weapon functions perfectly. However, the muzzle is bare. When firing with blanks, weapons have to have metal pieces called blank adaptors screwed into the muzzle to keep enough gas inside the weapon to cycle the bolt. Without one, the M60 would fire one round and stop.

Continuity mistake: There is a man with a blue hat dancing with a girl, the soldier looks outside a window and sees the same man at the same time slaughtering a pig.

Continuity mistake: In the final scene when the Cajun first shoots Powers Boothe his wound is on his left shoulder. After he stabs the next Cajun between the legs a few seconds later his partner walks over and looks down at him and his wound is now on his right shoulder.

Family5

Sgt. Casper: Son of a bitch! You could've busted his jaw.
Simms: That's right.
Sgt. Casper: We want him to talk.
Cpl. Lonnie Reece: You almost knocked his mouth straight down to his ass.
Sgt. Casper: Jesus Christ, Simms! We've got to interrogate the man. Now how the hell is he gonna talk to us if you're gonna break his fuckin' jaw?
Simms: That's his fuckin' problem.

Spencer: Here's your ammo... blade to the throat, huh, that how they do these things in El Paso?
Hardin: Yeah, that's how they do things where I grew up.
Spencer: Thought you're some kind of chemical engineer.
Hardin: I am, and I'm out of the habit of spending time with a bunch of gun-totin' rednecks.
Spencer: Well, you know how it is, down here in Louisiana, we don't carry guns, we carry ropes, RC colas and moon pies, we're not too smart, but we have a real good time.

Hardin: A truck! A fuckin' truck.