From a truly tragic scene in The Rock:

[the Marines have ambushed the SEALs in the Alcatraz showers]
Gen. Hummel: This is General Hummel! Drop your weapons! Drop ’em!
Cmdr. Anderson: Anderson here, General Hummel. Commander. Team leader.
Gen. Hummel: Commander Anderson, if you have any concern for the lives of your men, you will order them to safety their weapons and place them on the deck.
Agent Paxton: This is not happening...
Cmdr. Anderson: Sir, we know why you’re out here. God knows, I agree with you. But like you, I swore to defend this country against all enemies, foreign, sir...and domestic. General, we’ve spilled the same blood in the same mud. You know God damn well I can’t give that order.
SEAL: We’re dead!
Gen. Hummel: Your unit is covered from an elevated position, Commander. I’m not gonna ask you again. Don’t do anything stupid. No one has to die here.
Cmdr. Anderson: [raising his voice] You men following the General—you’re under oath as United States Marines, have you forgotten that? We all have shipmates we remember. Some of them were shit on and pissed on by the Pentagon. BUT THAT DOESN’T GIVE YOU THE RIGHT TO MUTINY!
Gen. Hummel: YOU CALL IT WHAT YOU WANT! YOU’RE DOWN THERE, WE’RE UP HERE! YOU WALKED INTO THE WRONG GODDAMN ROOM, COMMANDER!
Cmdr. Anderson: STAND FAST!
Gen. Hummel: God damn it, Commander, one last time—you tell your men to safety their weapons, drop ’em on the deck.
Cmdr. Anderson: I CANNOT GIVE THAT ORDER!
Gen. Hummel: I’M NOT GOING TO REPEAT THAT ORDER!
Cmdr. Anderson: I WILL NOT GIVE THAT ORDER!
Gen. Hummel: WHAT THE HELL IS WRONG WITH YOU, MAN?!
Cmdr. Anderson: STAND FAST!
SEAL: Oh God...!
Cpt. Frye: Let’s waste these fuckers.
Gen. Hummel: One more time—you order your men to safety their weapons—
[a Marine purposely knocks loose bricks onto the floor]
SEAL: [whirling around and opening fire] AAAAHH!!
[they all start shooting; Goodspeed, Mason and Shephard react from below]
Gen. Hummel: CEASE FIRE!
[Shephard tries to climb the ladder]
Stanley Goodspeed: Don’t go!
SEAL: [as he’s shot] AAAH!!
Gen. Hummel: CEASE FIRE!
Lt. Shephard: Shit! God damn! Let go of me! Let go of me!
Stanley Goodspeed: Don’t! Don’t go!
[Shephard ascends and stares at the slaughter before cutting loose]
Cmdr. Anderson: [firing his pistol] AaaAAAAH!!
[Darrow drops him; Shephard continues to blaze away until Frye shoots him, ending the firefight]