->'''Seven of Nine:''' The Borg once traveled back in time to stop [[Film/StarTrekFirstContact Zefram Cochrane]] from breaking the warp barrier. They succeeded, but that in turn led the starship ''Enterprise'' to intervene. They assisted Cochrane with the flight the Borg was trying to prevent. Causal loop complete.\\
'''Lt. Ducane:''' So, in a way, the Federation owes its existence to the Borg?\\
'''Seven:''' [[DeadpanSnarker You're welcome.]]
-->--'''''Series/StarTrekVoyager''''', "Relativity"

->'''Batman:''' [[DeathByOriginStory You killed my parents.]]\\
'''Joker:''' *confused* Heh? What are you talking about?\\
'''Batman:''' [[CreateYourOwnVillain I made you,]] [[RussianReversal but you made me first.]]\\
'''Joker:''' [[OhCrap *scared*]] Come on Bat-brain, I was a kid when I killed your parents. When I say I made you, you gotta say you made me! How childish can you get?
-->-- '''''Film/{{Batman}}'''''

->"''By now, there's so much paranoia running wild that you got guys checking in because they think they're about to be put on knock-off, see? If you're going to be iced for ratting when you're innocent, why not make yourself guilty, and score all the rewards that go along with it?"\\
I shrugged at the perfect cross he was describing. It was true enough - every gang put out hits on ''suspected'' rats, so it had to happen. You start suspecting you've ''been'' suspected, and...''
-->-- ''[[Creator/AndrewVachss Terminal]]''

->'''General Katana:''' Youíre not coming back to Zeist, [=MacLeod=].\\
'''Connor [=MacLeod=]:''' I never planned to.\\
'''General Katana:''' What do you mean?\\
'''Connor [=MacLeod=]''': After all this time, I was ready to kick back, grow old, and die. Then you send those punks down here. You changed everything. And now Iím back to square one -- immortal, again! So Katana, letís see who goes back to Zeist after all.
-->-- ''Film/HighlanderIITheQuickening''

-> ''I know that although the Daleks will create havoc and destruction for millions of years, I know also that from their evil must come something good.''
-->-- [[Series/DoctorWho The Doctor]], on why he doesn't wipe out the Daleks. [[JokerImmunity (Not that he hasn't tried, of course.)]]

-> '''Messala:''' By what magic do you bear the name of a Consul of Rome?\\
'''Judah:''' You were the magician, Messala. When my ship was sunk, I saved the Consul's life.
-->-- ''Film/BenHur''

->''Isn't this ironic? Here we are, all thanks to the dark magic curse you placed on Link!''
-->--'''Midna''', ''VideoGame/TheLegendOfZeldaTwilightPrincess''

->''Close the blast doors!''\\
(Han and Chewie barely get through, causing the attempt to trap them to backfire.)\\
''[[OhCrap Open the blast doors]], '''open the blast doors'''!''
-->-- '''A random Stormtrooper''', ''Film/ANewHope Special Edition''

!!!On works
->''"General Katana is a FUCKING idiot! ...We wouldn't even have a movie if you'd just stayed at home, played some Nintendo, and let the poor bastard drink himself to death in two years. But ''no'', you had to go to Earth and shake his fucking tree."''
-->-- '''Noah Antwiler''', ''WebVideo/TheSpoonyExperiment''