The ChosenOne is confronted with his ultimate destiny. The prophecy is about to be fulfilled.

But the ChosenOne doesn't want to. Maybe he's [[RefusalOfTheCall refusing the call]]. Or maybe he's just [[AchillesInHisTent sulking]]. Maybe he's too busy wallowing in his own {{Wangst}}, or in the grip of a HeroicBSOD. But for whatever reason, the ChosenOne doesn't want to do the job that ''only he'' can do.

So [[TheLancer his friend]] goes out to do it instead, saying, "If you won't, I will." This is usually an ultimatum, because everyone knows that the friend can't do it, that only the ChosenOne can do it.

This leads to either the hero stopping his friend before he goes to get himself killed, or the hero lets the friend go and [[DeadSidekick gets himself killed]]. The latter usually triggers a RoaringRampageOfRevenge that fulfills the ChosenOne's ultimate destiny.

The destiny part isn't really important. It could simply be that the friend is incompetent and the hero knows that he'll get himself killed/captured. And the friend probably knows this as well, so he uses it to spur the hero to action.
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!!Examples:

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[[folder: Anime and Manga]]
* One of the times Shinji considers quitting in ''Anime/NeonGenesisEvangelion'', Rei comments that if he does, she'll take over his duties.
** In the first episode, Gendou threatens to send the grievously injured Rei to pilot in Shinji's place, effectively blackmailing Shinji into being a pilot to begin with.
** In ''RebuildOfEvangelion'' Rei knows it's too much for Shinji, so when he leaves she reasons if she kills the Angels then he will never have to pilot again. [[DeathSeeker Of course]] this cues her HeroicSacrifice.
* An inversion of this occurs in the 13th ''DragonballZ'' movie where Goku ponders to himself, "If '''I''' don't, who will?!"
* In ''GingaDensetsuWeed'', after finally defeating Hougen, Weed was given the chance to kill the evil Great Dane. But when Weed refuses, Gin goes forward and goes to kill Hougen, saying he will have to kill him if his son doesn't. Three guesses what happens next.
** This is also used by Weed when GB backs out from saving Sasuke from a massive guard dog.
* Yahiko shouts something vaguely along these lines when finally giving up on Kenshin during his HeroicBSOD in the Jinchuu arc, and a bit later winds up in a one-on-one fight with [[UpToEleven the guy who has a cannon for an arm]]. It's not a CurbStompBattle, incredibly, but Yahiko is ''clearly'' going to die. Tsubame makes her way into the Ultra-Slum of Doom to tell Kenshin about how hard Yahiko is trying and how much he needs Kenshin now, and that's what finally brings him back.
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[[folder:Comic Books]]
* ''ThePowerpuffGirls'' story "Sounding Off" (Cartoon Network Block Party #37) has Blossom invoking this after once too many times Bubbles and Buttercup pester her because Bubbles won't stop crying and Buttercup won't stop bellyaching.
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[[folder:Literature]]
* In Creator/RobertAHeinlein's ''Literature/ThePuppetMasters'', the hero Sam is asked to allow one of the title monsters to take control of him as an experiment. He refuses, and discovers that his girlfriend Mary has volunteered to do it and will be going in his place. He reverses himself and agrees to take part.
* In ''Literature/HarryPotterAndTheHalfBloodPrince'', Snape [[spoiler:kills Dumbledore because Draco was having second thoughts... and because Dumbledore wanted to prevent Draco from taking that unforgivable step into evil]].
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[[folder: Live Action Television]]
* In ''Series/{{Heroes}}'', Hiro panics at having not killed Sylar, so Ando sets out to kill Sylar instead. Sylar kicks Ando's powerless ass with ease and nearly decapitates him before Hiro shows up. This actually happens quite a lot with Hiro and Ando. Hiro gets all whiny, then Ando sets out to do it, the two get seperated and mad at each other. Then Hiro comes to his senses and saves Ando just before he gets himself killed. Then they're all happy, at least, until it happens again...
* In ''Series/BuffyTheVampireSlayer'', Giles does this sort of thing a few times for Buffy, but fulfils the trope most clearly in the season one finale. Buffy, hearing that she is prophesied to confront the Master and die, quits in horror. Giles decides to go after the Master himself in an attempt to save her, but a newly-resigned Buffy knocks him out and heads off, planning to at least take the Master down with her.
* In ''Series/PowerRangersJungleFury'', after Lily gets a sudden personality change, she becomes a complete jerk, wasting time in the pizzeria they work in. Fellow worker Fran, who at this point figured out their secret, calls her down on this behavior. And when Lily refuses to budge, Fran takes Lily's morpher, saying this trope. A CatFight ensues.
[[/folder]]

[[folder:Mythology]]
* Related to AchillesInHisTent, as noted above, and in fact the Iliad is a perfect example of this trope: Achilles' friend Patroclus goes into battle in his stead, and gets himself killed. His death spurs Achilles to rejoin the fight.
[[/folder]]

[[folder: Western Animation]]
* ''FairlyOddParents'': the Crimson Chin sulks, so his sidekick, Cleft, tries to do the work for him. But after Cleft gets in trouble, the Crimson Chin wakes out of his {{Wangst}} to save him.
* In ''WesternAnimation/{{Up}}'', Russell does this to try and get Kevin back when Carl went into his HeroicBSOD.
[[/folder]]
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