The Dark Knight Rises:
Bruce: Alfred, I need you to take these codes to Lucius Fox, it is important for my mission.
Alfred: I quit. I can’t watch you die.
Bruce: But you promised my parents you’d always protect me no matter what?
Alfred: I’ll take the codes, but after that I’m getting the Hell outta dodge. Peace.
Alfred: *actually LEAVES and you don’t see him again till the end of the film*
Tony: Pepper, I need you to take this chip and hack into my computer. It is important for my mission.
Pepper: I quit. I can’t watch you die.
Tony: But you never batted an eye when I was an actual jerk-off of a person? WTF!
Pepper: *takes log chip, discovers plot to kill Tony, leads SHIELD to Obadiah, overrides ARC Reactor, patches up wounded Tony*