"Don't waste it. Don't waste your life, Stark." Ho Yinsen
"I'll give you Stark, and you'll give me an army of metal soldiers—" Raza
"Hold still, you little prick." Obadiah Stane
"Oh, no. I've never mistaken anything about you since you were a kid. Houdini's out of the bottle. We gave... a wondeful gift to the world. I'm stuck. We've done our part. Now it's time for both of us to go. No. NO!" Stane's last words in a deleted scene.
The Incredible Hulk
"So Banner's the only—" Major Kathleen Sparr
"Sweet." Redshirt finding a bazooka
"Booyah!" Redshirt firing a bazooka
Iron Man 2
"(In Russian) I am sorry. All I can give you... is my knowledge." Anton Vanko
"You lose." Ivan Vanko
"Run home, little princess." A Jotunn before getting smacked by Thor
"It's said you can still hear and see what transpires around you. I hope it's true, so that you may know your end came at the hand of Laufey." Laufey, before being killed by Loki
Captain America: The First Avenger
"You cannot control the power you hold. You will burn!" Tower Keeper, before Red Skull responds saying, "I already have." and shooting the poor man.
"Stop him!" Dr. Erskine, right before being shot by Heins Kruger
"The first of many. Cut off one head, two more shall take its place. Heil... HYDRA..." Heinz Kruger
"For making it clear how obviously mad you are." SS Officer 2, responding to Red Skull saying "For what?" after saying, "Thank you, Schmidt."
"You will be punished for your insolence! You will be brought before the fūhrer himself!" SS Officer 3
"SCHMIDT!!!" SS Officer 1
"I'm sorry Herr Schmidt. We fought to the last man." A German officer
"What have you done? NO...!" Red Skull, before being vaporized by the Tesseract (The Cosmic Cube)
"It's okay boss. This was never going to work, unless they had something to..." Agent Phil Coulson... or not.
Iron Man 3
"Savin, help! Help ME!" Jack Taggert as he explodes
"I think I need to sleep for a while, sir." JARVIS... briefly, after running out of battery power in the Mark 42
"Deputy, get this woman—" Tennessee Sheriff that gets killed by one of Killian's mooks, Ellen Brandt.
"That all you got? A cheap trick and a cheesy one-liner?" Ellen Brandt
"What about you, Aldrich? What happens if you get too hot?" Maya Hansen before being shot and killed by the true Mandarin himself, Aldrich Killian.
"How did we get this shift?" One of Killian's normal mooks at the mansion assigned to keep watch on Tony Stark, gets killed by a repulsor blast from one of the Mark 42 arm pieces that comes to Tony.
"He's not here. Try the jet stream. Speaking of which, go fish." Eric Savin, before blowing a hole in Air Force One (causing the passengers in the other room to get sucked out and sent falling), gets killed by Iron Man seconds later.
"No more false faces. You said you wanted the Mandarin. You're looking right at him. It was always me, Tony. Right from the start. I AM THE MANDARIN!" Aldrich Killian (aka The Mandarin), before getting owned by Pepper Potts, who was injected with Extremis earlier.
Agents of S.H.I.E.L.D.
"Oh, God." The Englishman
"We're here to get you out." Quan Chen
"It already does." Chan Ho Yin (aka Scorch), before being given an overdose of Extremis, causing him to get blown to Kingdom Come.
"Stay here with Skye. You remember Skye, right? I've gotta make something right. I love you." Mike Peterson to his son, before he tries to go back and save Coulson, but ultimately gets caught in an explosion on the bridge.
Thor 2: The Dark World
"I will never tell you." Frigga, before being murdered by Malekith
"(In the Dark Elves' language) He [Loki] is an enemy of Asgard. I saw him as their prisoner." Kurse. Gets killed after stabbing Loki (who actually faked his own death), minutes later.
"Do you think that this can be stopped? The Aether can not be destroyed." Malekith, before his defeat